From 8cce4e8ffa77e1e2b89812e5e2ccf6cfbc1086cf Mon Sep 17 00:00:00 2001 From: turmary Date: Wed, 30 Sep 2020 15:04:47 +0800 Subject: [PATCH] Add: document about "query sound card number" --- README.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/README.md b/README.md index dcd158e..e884227 100644 --- a/README.md +++ b/README.md @@ -196,7 +196,22 @@ plughw:CARD=seeed8micvoicec,DEV=0 In contrast to 6-Mics Circular Array Kit for Raspberry Pi, the difference is only first 4 input channels are valid capture data. + ### Usage: + +```bash +#Query sound card number +# The sound card number used as arecord/aplay argument, +# ( like '-D hw:N' and '-D plughw:N', where N is the number ) +# could be found by command: + aplay -l +#or + arecord -l +# Find the line in the command output which near below form: +card 1: seeed2micvoicec [seeed-2mic-voicecard], device 0: ... +# The number between first word `card` and char `:` is the Sound Card Number, here it's 1. +``` + ```bash #for ReSpeaker 2-mic #It will capture sound an playback on hw:1