October 9, 20233 yr Hi everyone! I am struggling with audio input. Output audio from LINEOUT pins works fine out-of-the-box! What about the audio input? To begin with I have tested the arecord command with these error messages… TEST 1 root@rockpi-s:~# arecord -f S16_LE -d 10 -r 16000 --device=“hw:0,0” test-mic.wav Recording WAVE ‘test-mic.wav’ : Signed 16 bit Little Endian, Rate 16000 Hz, Mono arecord: set_params:1358: Channels count non available TEST 2 root@rockpi-s:~# arecord -f S16_LE -c 2 -d 10 -r 16000 --device=“hw:0,0” test-mic.wav Recording WAVE ‘test-mic.wav’ : Signed 16 bit Little Endian, Rate 16000 Hz, Stereo arecord: set_params:1416: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: S16_LE SUBFORMAT: STD SAMPLE_BITS: 16 FRAME_BITS: 32 CHANNELS: 2 RATE: 16000 PERIOD_TIME: 125000 PERIOD_SIZE: 2000 PERIOD_BYTES: 8000 PERIODS: 4 BUFFER_TIME: 500000 BUFFER_SIZE: 8000 BUFFER_BYTES: 32000 TICK_TIME: 0 Any suggestions?
October 10, 20233 yr Author Hi again! Todays update: When doing the dmesg command it returns the following below. How to interpret these error messages? root@rockpi-s:~# dmesg [ 375.793438] rockchip-i2s-tdm ff320000.i2s: ASoC: error at snd_soc_dai_hw_params on ff320000.i2s: -22 [ 375.793546] ff320000.i2s-rk3308-hifi: ASoC: error at __soc_pcm_hw_params on ff320000.i2s-rk3308-hifi: -22 Edited October 10, 20233 yr by danj
April 13, 20251 yr Did you ever figure out how to get this working? Is the headphone jack on the PoE HAT actually a TRRRS with a mic input connection like on a computer? I know to activate the headphone jack you have to enable a GPIO, maybe there's also one for the mic? I have settings matching the capabilities, but no joy. I always get "set_params:1416: Unable to install hw params:" Edited April 13, 20251 yr by Meestor_X
April 13, 20251 yr arecord -f dat -D plughw:analog Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo arecord: set_params:1416: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: S16_LE SUBFORMAT: STD SAMPLE_BITS: 16 FRAME_BITS: 32 CHANNELS: 2 RATE: 48000 PERIOD_TIME: 125000 PERIOD_SIZE: 6000 PERIOD_BYTES: 24000 PERIODS: 4 BUFFER_TIME: 500000 BUFFER_SIZE: 24000 BUFFER_BYTES: 96000 TICK_TIME: 0
May 19, 20251 yr You can find this information on the Rock Pi S PoE Hat Wiki, but you need to write some GPIO values to enable the headphone jack. # echo 15 > /sys/class/gpio/export # echo out > /sys/class/gpio/gpio15/direction # echo 1 > /sys/class/gpio/gpio15/value To persist this across reboots you can create a `systemd-tmpfile` at `/etc/tmpfiles.d/enable-audio-jack.conf` with the following contents. w /sys/class/gpio/export - - - - 15 w /sys/class/gpio/gpio15/direction - - - - out w /sys/class/gpio/gpio15/value - - - - 1
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