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Update DOCS.md
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Alexandre
@@ -77,6 +77,7 @@ arecord -D hw:1,0 --dump-hw-params
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sudo nano startmic.sh
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```
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#!/bin/bash
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#!/bin/bash
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echo "Starting birdmic"
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# Disable gigabit ethernet
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sudo ethtool -s eth0 speed 100 duplex full autoneg on
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@@ -84,17 +85,26 @@ sudo ethtool -s eth0 speed 100 duplex full autoneg on
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./mediamtx & true
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# Create rtsp feed
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sleep 5
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# Using hw
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ffmpeg -nostdin -f alsa -acodec pcm_s16le -ac 2 -ar 48000 -i hw:0,0 -f rtsp -acodec pcm_s16le rtsp://localhost:8554/birdmic -rtsp_transport tcp || true & true
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# Using plughw
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#ffmpeg -nostdin -f alsa -acodec pcm_s32le -ac 2 -ar 48000 -i plughw:1,0 -f rtsp -acodec pcm_s16be rtsp://localhost:8554/birdmic -rtsp_transport tcp -buffer_size 512k || true & true
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# Using plughw with high, lowpass, and limit to avoid clipping
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#ffmpeg -nostdin -f alsa -acodec pcm_s32le -ac 2 -ar 48000 -i plughw:0,0 -af "highpass=f=100, lowpass=f=15000, alimiter=limit=1.0:attack=5:release=50" -f rtsp -acodec pcm_s16be rtsp://localhost:8554/birdmic -rtsp_transport tcp -buffer_size 512k || true & true
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ffmpeg -nostdin -f alsa -acodec pcm_s16le -ac 2 -ar 96000 -i plughw:0,0 -f rtsp -acodec pcm_s16be rtsp://localhost:8554/birdmic -rtsp_transport tcp -buffer_size 512k || true & true
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#ffmpeg -nostdin -f alsa -acodec pcm_s32be -ac 2 -ar 48000 -i plughw:0,0 -f rtsp -acodec pcm_s16be rtsp://localhost:8554/birdmic -rtsp_transport tcp -buffer_size 512k || true & true
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# Set microphone volume
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sleep 5
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MICROPHONE_NAME="Line In 1 Gain" # for Focusrite Scarlett 2i2
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amixer -c 0 sset "$MICROPHONE_NAME" 60%
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sudo amixer -c 0 sset "$MICROPHONE_NAME" 40
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sleep 60
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if [ -f "$HOME/focusrite.sh" ]; then
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touch /tmp/log /tmp/log_error
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"$HOME/focusrite.sh" & true >/tmp/log 2>/tmp/log_error
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fi
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if [ -f "$HOME/autogain.py" ]; then
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touch /tmp/log /tmp/log_error
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python autogain.py & true >/tmp/log 2>/tmp/log_error
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fi
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```
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@@ -167,55 +177,55 @@ sudo systemctl start tmp.mount
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<details>
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<summary>Optional : Configuration for Focusrite Scarlett 2i2</summary>
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Add this content in "$HOME/focusrite.sh"
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```
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#!/bin/bash
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# Set PCM controls for capture
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amixer -c 0 cset numid=31 'Analogue 1' # 'PCM 01' - Set to 'Analogue 1'
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amixer -c 0 cset numid=32 'Analogue 1' # 'PCM 02' - Set to 'Analogue 1'
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amixer -c 0 cset numid=33 'Off' # 'PCM 03' - Disabled
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amixer -c 0 cset numid=34 'Off' # 'PCM 04' - Disabled
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sudo amixer -c 0 cset numid=31 'Analogue 1' # 'PCM 01' - Set to 'Analogue 1'
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sudo amixer -c 0 cset numid=32 'Analogue 1' # 'PCM 02' - Set to 'Analogue 1'
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sudo amixer -c 0 cset numid=33 'Off' # 'PCM 03' - Disabled
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sudo amixer -c 0 cset numid=34 'Off' # 'PCM 04' - Disabled
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# Set DSP Input controls (Unused, set to Off)
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amixer -c 0 cset numid=29 'Off' # 'DSP Input 1'
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amixer -c 0 cset numid=30 'Off' # 'DSP Input 2'
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sudo amixer -c 0 cset numid=29 'Off' # 'DSP Input 1'
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sudo amixer -c 0 cset numid=30 'Off' # 'DSP Input 2'
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# Configure Line In 1 as main input for mono setup
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amixer -c 0 cset numid=8 'Off' # 'Line In 1 Air' - Keep 'Off'
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amixer -c 0 cset numid=14 off # 'Line In 1 Autogain' - Disabled
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amixer -c 0 cset numid=13 80% # 'Line In 1 Gain' - Set gain to 21
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amixer -c 0 cset numid=6 'Line' # 'Line In 1 Level' - Set level to 'Line'
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amixer -c 0 cset numid=21 on # 'Line In 1 Safe' - Enabled to avoid clipping / noise impact ?
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sudo amixer -c 0 cset numid=8 'Off' # 'Line In 1 Air' - Keep 'Off'
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sudo amixer -c 0 cset numid=14 off # 'Line In 1 Autogain' - Disabled
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sudo amixer -c 0 cset numid=6 'Line' # 'Line In 1 Level' - Set level to 'Line'
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sudo amixer -c 0 cset numid=21 on # 'Line In 1 Safe' - Enabled to avoid clipping / noise impact ?
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# Disable Line In 2 to minimize interference (if not used)
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amixer -c 0 cset numid=9 'Off' # 'Line In 2 Air'
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amixer -c 0 cset numid=17 off # 'Line In 2 Autogain' - Disabled
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amixer -c 0 cset numid=16 0 # 'Line In 2 Gain' - Set gain to 0 (mute)
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amixer -c 0 cset numid=7 'Line' # 'Line In 2 Level' - Set to 'Line'
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amixer -c 0 cset numid=22 off # 'Line In 2 Safe' - Disabled
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sudo amixer -c 0 cset numid=9 'Off' # 'Line In 2 Air'
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sudo amixer -c 0 cset numid=17 off # 'Line In 2 Autogain' - Disabled
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sudo amixer -c 0 cset numid=16 0 # 'Line In 2 Gain' - Set gain to 0 (mute)
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sudo amixer -c 0 cset numid=7 'Line' # 'Line In 2 Level' - Set to 'Line'
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sudo amixer -c 0 cset numid=22 off # 'Line In 2 Safe' - Disabled
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# Set Line In 1-2 controls
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amixer -c 0 cset numid=12 off # 'Line In 1-2 Link' - No need to link for mono
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amixer -c 0 cset numid=10 on # 'Line In 1-2 Phantom Power' - Enabled for condenser mics
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sudo amixer -c 0 cset numid=12 off # 'Line In 1-2 Link' - No need to link for mono
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sudo amixer -c 0 cset numid=10 on # 'Line In 1-2 Phantom Power' - Enabled for condenser mics
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# Set Analogue Outputs to use the same mix for both channels (Mono setup)
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amixer -c 0 cset numid=23 'Mix A' # 'Analogue Output 01' - Set to 'Mix A'
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amixer -c 0 cset numid=24 'Mix A' # 'Analogue Output 02' - Same mix as Output 01
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sudo amixer -c 0 cset numid=23 'Mix A' # 'Analogue Output 01' - Set to 'Mix A'
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sudo amixer -c 0 cset numid=24 'Mix A' # 'Analogue Output 02' - Same mix as Output 01
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# Set Direct Monitor to off to prevent feedback
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amixer -c 0 cset numid=53 'Off' # 'Direct Monitor'
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sudo amixer -c 0 cset numid=53 'Off' # 'Direct Monitor'
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# Set Input Select to Input 1
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amixer -c 0 cset numid=11 'Input 1' # 'Input Select'
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sudo amixer -c 0 cset numid=11 'Input 1' # 'Input Select'
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# Optimize Monitor Mix settings for mono output
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amixer -c 0 cset numid=54 153 # 'Monitor 1 Mix A Input 01' - Set to 153 (around -3.50 dB)
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amixer -c 0 cset numid=55 153 # 'Monitor 1 Mix A Input 02' - Set to 153 for balanced output
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amixer -c 0 cset numid=56 0 # 'Monitor 1 Mix A Input 03' - Mute unused channels
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amixer -c 0 cset numid=57 0 # 'Monitor 1 Mix A Input 04'
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sudo amixer -c 0 cset numid=54 153 # 'Monitor 1 Mix A Input 01' - Set to 153 (around -3.50 dB)
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sudo amixer -c 0 cset numid=55 153 # 'Monitor 1 Mix A Input 02' - Set to 153 for balanced output
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sudo amixer -c 0 cset numid=56 0 # 'Monitor 1 Mix A Input 03' - Mute unused channels
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sudo amixer -c 0 cset numid=57 0 # 'Monitor 1 Mix A Input 04'
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# Set Sync Status to Locked
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amixer -c 0 cset numid=52 'Locked' # 'Sync Status'
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sudo amixer -c 0 cset numid=52 'Locked' # 'Sync Status'
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echo "Mono optimization applied. Only using primary input and balanced outputs."
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```
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@@ -224,6 +234,8 @@ echo "Mono optimization applied. Only using primary input and balanced outputs."
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<details>
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<summary>Optional : Autogain script for microphone</summary>
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Add this content in "$HOME/autogain.py"
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```python
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#!/usr/bin/env python3
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"""
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