Pulseaudio SPDIF Input, LFE remix - Revision history

Joachim: /* Loopback line in to line out */

2022-03-07T16:32:53Z

Loopback line in to line out

← Older revision		Revision as of 16:32, 7 March 2022
Line 45:		Line 45:
	pacat -r --latency-msec=1 -d 'alsa_input.usb-FMIC_Fender_Mustang_Micro_396234823131-00.iec958-stereo' \| \		pacat -r --latency-msec=1 -d 'alsa_input.usb-FMIC_Fender_Mustang_Micro_396234823131-00.iec958-stereo' \| \
	pacat -p --latency-msec=1 -d 'alsa_output.usb-0ccd_USB_Audio-00.analog-surround-51'		pacat -p --latency-msec=1 -d 'alsa_output.usb-0ccd_USB_Audio-00.analog-surround-51'


			== Loop Job4 Audio to Fender Mustang Micro ==

			To feed chordsplay.py songs running on job4 into Fender Mustang Micro as backing track via bluetooth

			script is in /home/joachim/pa/job42fender.sh

			# send linux sound to fender amp to play along
			# use wired headphones on the fender amp to avoid delay
			# or wireless:
			# mustang-micro->3.5-male-male-cable->3.5-female-to-6.5-male-adapter->iRig2(through)->Cuvave-TX-> ~ ->Cuvave-Rx->Amp

			fender_mac='84:17:15:15:F0:20'
			fender_sink="bluez_sink.${fender_mac//:/_}.a2dp_sink"
			fender_source="alsa_output.usb-0ccd_USB_Audio-00.analog-surround-51.monitor"

			echo -e "power on\nquit" \| bluetoothctl
			while ! echo -e "show\nquit" \| bluetoothctl \| grep 'Powered: yes'; do
			echo "Wait for power on"
			sleep 1
			done

			echo -e "connect $fender_mac\nquit" \| bluetoothctl
			try=0
			while ! pactl list sinks short \| fgrep "$fender_sink"; do
			echo "Wait for $fender_sink"
			try=$((try+1))
			if [ $try -gt 5 ]; then
			echo -e "connect $fender_mac\nquit" \| bluetoothctl
			echo "Restart device?"
			fi
			sleep 1;
			done

			echo "Connect $fender_source to $fender_sink. Ctrl-C to end"
			pacat -r --latency-msec=1 -d "$fender_source" \| \
			pacat -p --latency-msec=1 -d "$fender_sink"

Joachim at 13:32, 23 February 2022

2022-02-23T13:32:34Z

← Older revision		Revision as of 13:32, 23 February 2022
Line 18:		Line 18:

	systemctl --user restart pulseaudio.service		systemctl --user restart pulseaudio.service


			== Loopback line in to line out ==

			=== PulseAudio Control ===

			This has long delay

			==== Start Loopback ====

			* pactl load-module module-loopback

			==== Stop loopback ====

			* pactl unload-module module-loopback

			=== PulseAudio Cat ===

			This can have short delay

			Install pulseaudio manager to look for the audio device names, then write script to start the monitoring with short delay

			* sudo zypper in paman
			* paman -> look at property of sink and source (to copy/paste the long names)
			* write script to start monitoring
			pacat -r --latency-msec=1 -d 'alsa_input.usb-FMIC_Fender_Mustang_Micro_396234823131-00.iec958-stereo' \| \
			pacat -p --latency-msec=1 -d 'alsa_output.usb-0ccd_USB_Audio-00.analog-surround-51'

Joachim: Created page with "== Route the SPDIF input of the Aureon 5.1 USB Soundcard to its 5.1 output == === For my ESP32 Bluetooth to Toslink Project, start this === arecord -f S16_LE -c 2 -r 48000 -D iec958 --disable-channels --disable-format --disable-softvol --disable-resample -B 100000 -t raw | \ aplay -f S16_LE -c 2 -r 44100 -D default --disable-channels --disable-format --disable-softvol --disable-resample -B 100000 -t raw Bit strange: BT A2DP sends 44100 samples/s but iec958 seems..."

2022-01-27T19:17:05Z

Created page with "== Route the SPDIF input of the Aureon 5.1 USB Soundcard to its 5.1 output == === For my ESP32 Bluetooth to Toslink Project, start this === arecord -f S16_LE -c 2 -r 48000 -D iec958 --disable-channels --disable-format --disable-softvol --disable-resample -B 100000 -t raw | \ aplay -f S16_LE -c 2 -r 44100 -D default --disable-channels --disable-format --disable-softvol --disable-resample -B 100000 -t raw Bit strange: BT A2DP sends 44100 samples/s but iec958 seems..."

New page

== Route the SPDIF input of the Aureon 5.1 USB Soundcard to its 5.1 output ==

=== For my ESP32 Bluetooth to Toslink Project, start this ===

arecord -f S16_LE -c 2 -r 48000 -D iec958 --disable-channels --disable-format --disable-softvol --disable-resample -B 100000 -t raw | \
aplay -f S16_LE -c 2 -r 44100 -D default --disable-channels --disable-format --disable-softvol --disable-resample -B 100000 -t raw

Bit strange: BT A2DP sends 44100 samples/s but iec958 seems to be locked to 48000, so fix speed during output or voices are a bit too high

=== For a good sound, the LFE needs to do some work for the small satelites ===

/etc/pulse/daemon.conf

enable-lfe-remixing = yes
lfe-crossover-freq = 100

To enable changes

systemctl --user restart pulseaudio.service