btwin 0 Posted May 15, 2023 Hi, I am using Tinker Board S microphone input to analyze high frequency audio recording in my project. The 24bit/96KHz audio recording resolution provided by Tinker Board S RTL ALC4040 HD CODEC is sufficient for my project. I would like to know if the Audio RTL ALC4030U CODEC used in Tinker Board S R2.0 version provides 96Khz or higher resolution audio recording. Is there an address where I can find technical information about RTL ALC4030U CODEC? Thanks, Share this post Link to post Share on other sites
btwin 0 Posted May 27, 2023 According to my tests Audio RTL ALC4030U CODEC used in Tinker Board S R2.0 version does not provide 96Khz audio input. It only supports 48Khz sampling frequency. $ arecord -d 5 -f S24_3LE --device="hw:0,1" --channels=2 --rate=96000 test.mp3 Recording WAVE 'test.mp3' : Signed 24 bit Little Endian in 3bytes, Rate 96000 Hz, Stereo Warning: rate is not accurate (requested = 96000Hz, got = 48000Hz) please, try the plug plugin Share this post Link to post Share on other sites
btwin 0 Posted May 27, 2023 I found a datasheet for REALTEK ALC4030 codec at https://download.datasheets.com/pdfs2/2020/3/20/10/38/7/53589/rts_/manual/alc4030.pdf In this datasheet RTL ALC4030 codec supports 96 KHz sample rate microphone input. "One stereo and mono ADCs support 8/16/24/32/44.1/48/96KHz Sample Rate, 16/24-bit" I do not know why Tinker Board S R2.0 does not support 96Khz. Share this post Link to post Share on other sites
tooz 47 Posted May 31, 2023 hello @btwin, On 5/27/2023 at 2:16 PM, btwin said: According to my tests Audio RTL ALC4030U CODEC used in Tinker Board S R2.0 version does not provide 96Khz audio input. It only supports 48Khz sampling frequency. this issue can be reproduced on our side and we're working on it, will keep you updated when it's fixed Share this post Link to post Share on other sites
btwin 0 Posted June 1, 2023 Thank you very much @tooz. I hope microphone port supports upto 192 KHz (or more) sampling rate. Share this post Link to post Share on other sites
tooz 47 Posted June 7, 2023 hello @btwin, please check inbox for the firmware Share this post Link to post Share on other sites
btwin 0 Posted June 11, 2023 Hello, The new firmware worked. I can now record audio with 96 Khz sampling rate. I wonder if it is possible to support with 192 Khz sampling rate on Tinker Board R2.0 since RTL ALC4030U CODEC actually supports it. Thanks a lot. Share this post Link to post Share on other sites
