fix: improve voice quality and add distortion troubleshooting
- Fix RNNoise configuration: use mono instead of stereo, increase VAD threshold to 95% - Adjust quantum settings: increase min-quantum to 64 for stability - Add comprehensive voice distortion troubleshoot script - Create optional disable-auto-rnnoise.nix for problematic setups - The automatic RNNoise filter can cause artifacts, script helps diagnose and fix
This commit is contained in:
Geir Okkenhaug Jerstad
parent
52a9d544fc
commit
406acb3daf
3 changed files with 318 additions and 5 deletions
25
modules/sound/disable-auto-rnnoise.nix
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25
modules/sound/disable-auto-rnnoise.nix
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{
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config,
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lib,
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pkgs,
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...
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}: {
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# Optional configuration to disable automatic RNNoise filter
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# This can be imported if the automatic filter causes distortion
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services.pipewire = {
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extraConfig.pipewire."15-disable-auto-rnnoise" = {
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"context.modules" = [
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# Commenting out the automatic RNNoise filter
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# Users should use EasyEffects for manual noise suppression instead
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# {
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# name = "libpipewire-module-filter-chain";
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# args = {
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# "node.description" = "Noise Canceling Source";
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# # ... rest of RNNoise config
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# };
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# }
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];
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};
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};
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}
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@ -24,8 +24,8 @@
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"context.properties" = {
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"default.clock.rate" = 48000;
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"default.clock.quantum" = 1024;
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"default.clock.min-quantum" = 32;
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"default.clock.max-quantum" = 2048;
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"default.clock.min-quantum" = 64;
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"default.clock.max-quantum" = 8192;
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};
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"context.modules" = [
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@ -40,10 +40,10 @@
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type = "ladspa";
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name = "rnnoise";
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plugin = "${pkgs.rnnoise-plugin}/lib/ladspa/librnnoise_ladspa.so";
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label = "noise_suppressor_stereo";
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label = "noise_suppressor_mono";
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control = {
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"VAD Threshold (%)" = 50.0;
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"VAD Grace Period (ms)" = 200;
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"VAD Threshold (%)" = 95.0;
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"VAD Grace Period (ms)" = 100;
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"Retroactive VAD Grace (ms)" = 0;
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};
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}
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@ -84,6 +84,9 @@
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# Validation script
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(writeShellScriptBin "validate-audio" (builtins.readFile ./validate-audio.sh))
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# Troubleshoot script for voice distortion
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(writeShellScriptBin "troubleshoot-voice-distortion" (builtins.readFile ./troubleshoot-voice-distortion.sh))
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# Optional: Professional audio tools
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# qjackctl # JACK control GUI (for JACK applications)
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285
modules/sound/troubleshoot-voice-distortion.sh
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285
modules/sound/troubleshoot-voice-distortion.sh
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#!/usr/bin/env bash
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# Voice Distortion Troubleshoot Script
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# This script helps diagnose and fix voice distortion issues in PipeWire
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set -euo pipefail
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echo "🎤 Voice Distortion Troubleshoot Tool"
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echo "===================================="
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echo ""
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# Colors for output
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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CYAN='\033[0;36m'
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NC='\033[0m' # No Color
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success() {
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echo -e "${GREEN}✅ $1${NC}"
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}
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warning() {
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echo -e "${YELLOW}⚠️ $1${NC}"
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}
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error() {
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echo -e "${RED}❌ $1${NC}"
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}
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info() {
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echo -e "${BLUE}ℹ️ $1${NC}"
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}
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highlight() {
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echo -e "${CYAN}🔧 $1${NC}"
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}
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echo "Let's diagnose your voice distortion issue step by step..."
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echo ""
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# 1. Check current audio settings
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echo "1. Current Audio Configuration"
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echo "=============================="
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if command -v wpctl >/dev/null 2>&1; then
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echo "Default devices:"
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wpctl status | head -20
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echo ""
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# Get default source
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DEFAULT_SOURCE=$(wpctl inspect @DEFAULT_AUDIO_SOURCE@ 2>/dev/null | grep "node.name" | head -1 | sed 's/.*"\(.*\)".*/\1/' || echo "unknown")
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info "Current default source: $DEFAULT_SOURCE"
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# Check sample rate
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CURRENT_RATE=$(pw-metadata -n settings | grep "clock.rate" | awk '{print $3}' || echo "unknown")
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info "Current sample rate: $CURRENT_RATE Hz"
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# Check buffer size
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CURRENT_QUANTUM=$(pw-metadata -n settings | grep "clock.quantum" | awk '{print $3}' || echo "unknown")
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info "Current buffer size: $CURRENT_QUANTUM samples"
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else
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error "wpctl not available"
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fi
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echo ""
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# 2. Check for common distortion causes
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echo "2. Distortion Diagnosis"
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echo "======================"
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# Check if using RNNoise filter
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if pw-dump 2>/dev/null | jq -r '.[] | select(.info.props."node.name" == "rnnoise_source")' | grep -q "rnnoise"; then
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warning "You're using the RNNoise filter chain - this might be causing distortion"
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echo " The automatic filter chain can sometimes cause artifacts"
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else
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info "Not using automatic RNNoise filter"
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fi
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# Check for high CPU usage
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if command -v pw-top >/dev/null 2>&1; then
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highlight "Checking PipeWire performance (5 seconds)..."
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timeout 5 pw-top --batch-mode 2>/dev/null | tail -10 || warning "Could not check performance"
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fi
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# Check input levels
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if command -v wpctl >/dev/null 2>&1; then
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echo ""
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echo "Current microphone volume levels:"
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wpctl get-volume @DEFAULT_AUDIO_SOURCE@ || warning "Could not get volume info"
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fi
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echo ""
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# 3. Quick fixes
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echo "3. Quick Fixes to Try"
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echo "===================="
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echo ""
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echo "Choose a solution to try:"
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echo ""
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echo "A) Disable automatic RNNoise filter (recommended first step)"
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echo "B) Lower microphone input gain"
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echo "C) Reduce buffer size for lower latency"
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echo "D) Use EasyEffects instead of filter chain"
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echo "E) Reset to safe audio settings"
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echo "F) Test different sample rates"
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echo "G) Monitor audio in real-time"
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echo "H) All of the above (comprehensive fix)"
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echo ""
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read -p "Enter your choice (A-H): " choice
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case $choice in
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A|a)
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echo ""
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highlight "Disabling automatic RNNoise filter..."
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if pw-dump 2>/dev/null | jq -r '.[] | select(.info.props."node.name" == "rnnoise_source") | .id' | while read id; do
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echo "Removing filter node $id"
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pw-cli destroy "$id" 2>/dev/null || warning "Could not remove filter $id"
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done; then
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success "RNNoise filter disabled"
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echo "Try speaking now. If distortion is gone, use EasyEffects for noise suppression instead."
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else
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warning "Could not disable RNNoise filter automatically"
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fi
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;;
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B|b)
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echo ""
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highlight "Lowering microphone input gain to 50%..."
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wpctl set-volume @DEFAULT_AUDIO_SOURCE@ 50%
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success "Microphone gain reduced to 50%"
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echo "Test your voice now. Adjust further if needed with: wpctl set-volume @DEFAULT_AUDIO_SOURCE@ X%"
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;;
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C|c)
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echo ""
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highlight "Setting lower buffer size for reduced latency..."
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pw-metadata -n settings 0 clock.force-quantum 512
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success "Buffer size set to 512 samples"
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echo "This should reduce latency but may increase CPU usage"
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;;
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D|d)
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echo ""
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highlight "Launching EasyEffects for manual noise suppression..."
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if command -v easyeffects >/dev/null 2>&1; then
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easyeffects &
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success "EasyEffects launched"
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echo ""
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echo "In EasyEffects:"
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echo "1. Go to 'Input' tab"
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echo "2. Add 'RNNoise' effect"
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echo "3. Set 'VAD Threshold' to 95% (very conservative)"
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echo "4. Set 'Wet' signal to 50-70% (not 100%)"
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echo "5. Disable any other aggressive processing"
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else
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error "EasyEffects not available"
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fi
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;;
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E|e)
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echo ""
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highlight "Resetting to safe audio settings..."
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# Reset quantum
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pw-metadata -n settings 0 clock.force-quantum 0
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# Reset rate
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pw-metadata -n settings 0 clock.force-rate 0
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# Set reasonable volume
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wpctl set-volume @DEFAULT_AUDIO_SOURCE@ 70%
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# Restart audio services
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systemctl --user restart pipewire pipewire-pulse wireplumber
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success "Audio settings reset to defaults"
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echo "Wait 5 seconds for services to restart, then test your voice"
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;;
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F|f)
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echo ""
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highlight "Testing different sample rates..."
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echo "Current rate: $(pw-metadata -n settings | grep clock.rate | awk '{print $3}' || echo 'default')"
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echo ""
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echo "Trying 44100 Hz..."
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pw-metadata -n settings 0 clock.force-rate 44100
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sleep 2
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echo "Test your voice now. Press Enter to continue..."
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read
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echo "Trying 48000 Hz..."
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pw-metadata -n settings 0 clock.force-rate 48000
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sleep 2
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echo "Test your voice now. Press Enter to continue..."
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read
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echo "Back to automatic rate..."
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pw-metadata -n settings 0 clock.force-rate 0
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success "Rate testing complete"
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;;
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G|g)
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echo ""
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highlight "Starting real-time audio monitoring..."
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echo "Press Ctrl+C to stop monitoring"
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echo ""
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if command -v pw-top >/dev/null 2>&1; then
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pw-top
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else
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echo "Monitoring with wpctl status (updating every 2 seconds):"
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while true; do
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clear
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echo "=== PipeWire Status ==="
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wpctl status
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echo ""
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echo "=== Microphone Volume ==="
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wpctl get-volume @DEFAULT_AUDIO_SOURCE@
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echo ""
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echo "Press Ctrl+C to stop"
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sleep 2
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done
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fi
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;;
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H|h)
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echo ""
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highlight "Running comprehensive fix..."
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# Step 1: Disable RNNoise filter
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echo "1/6: Disabling automatic RNNoise filter..."
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pw-dump 2>/dev/null | jq -r '.[] | select(.info.props."node.name" == "rnnoise_source") | .id' | while read id; do
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pw-cli destroy "$id" 2>/dev/null || true
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done
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# Step 2: Reset audio settings
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echo "2/6: Resetting audio settings..."
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pw-metadata -n settings 0 clock.force-quantum 0
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pw-metadata -n settings 0 clock.force-rate 0
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# Step 3: Set conservative volume
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echo "3/6: Setting conservative microphone gain..."
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wpctl set-volume @DEFAULT_AUDIO_SOURCE@ 60%
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# Step 4: Restart services
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echo "4/6: Restarting audio services..."
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systemctl --user restart pipewire pipewire-pulse wireplumber
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# Step 5: Wait for restart
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echo "5/6: Waiting for services to stabilize..."
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sleep 5
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# Step 6: Launch EasyEffects
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echo "6/6: Launching EasyEffects for manual control..."
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if command -v easyeffects >/dev/null 2>&1; then
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easyeffects &
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success "Comprehensive fix applied!"
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echo ""
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echo "Next steps:"
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echo "1. Test your voice without any effects first"
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echo "2. In EasyEffects, gradually add noise suppression:"
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echo " - Start with RNNoise at 50% wet signal"
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echo " - Use VAD threshold of 95% or higher"
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echo " - Avoid aggressive compression or EQ"
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echo "3. If still distorted, try lowering input gain further"
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else
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warning "EasyEffects not available for manual control"
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fi
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;;
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*)
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error "Invalid choice"
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;;
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esac
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echo ""
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echo "🎯 Additional Tips to Prevent Distortion:"
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echo "========================================="
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echo ""
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echo "• Keep microphone gain below 80% to avoid clipping"
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echo "• Use RNNoise conservatively (50-70% wet signal, not 100%)"
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echo "• Check for background applications using audio"
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echo "• Ensure your microphone hardware supports 48kHz"
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echo "• Consider using a better quality microphone"
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echo "• Avoid stacking multiple noise reduction effects"
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echo ""
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echo "Run this script again anytime with: troubleshoot-voice-distortion"
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