From a5095cd7b2e43b528bb9e3b82c539f265685d008 Mon Sep 17 00:00:00 2001 From: Hin-Tak Leung Date: Thu, 10 Sep 2020 23:18:08 +0100 Subject: [PATCH] comment about Raspberry Pi 4 having two HDMI ports The if-endif block below around the amixer call fixes https://github.com/respeaker/seeed-voicecard/issues/239 https://github.com/respeaker/seeed-voicecard/issues/240 https://github.com/respeaker/seeed-voicecard/issues/243 --- seeed-voicecard | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/seeed-voicecard b/seeed-voicecard index 79a3551..9a135a1 100755 --- a/seeed-voicecard +++ b/seeed-voicecard @@ -150,6 +150,12 @@ fi alsactl restore #Force 3.5mm ('headphone') jack +# The Raspberry Pi 4, released on 24th Jun 2019, has two HDMI ports, +# and can drive two displays with audios for two users simultaneously, +# in a "multiseat" configuration. The earlier single virtual ALSA +# option for re-directing audio playback between headphone jack and HDMI +# via a 'Routing' mixer setting was turned off eventually to allow +# simultaneous usage of all 3 playback devices. if aplay -l | grep -q "bcm2835 ALSA"; then amixer cset numid=3 1 || true fi