microphone input(M1) in DM365EVM

TIG

Intellectual 270 points

Hi,

I am using dm365EVM.

I want to encode the voice by using microphone input (M1) in EVM.

I completed the integration of MP3 codecs. (Refer to the following site)

http://processors.wiki.ti.com/index.php/DM365_Audio_Codecs_Integration_with_DVSDK_2.10.01.18_Demos

So , I can encode the voice via MIC IN (and LINE IN).

But, I do not know the setting method of M1.

What should I change to use M1? device driver ? application ?

over 15 years ago

0 Vincent W. over 15 years ago

TI__Genius 12865 points

The latest dvsdk encode demo uses the MIC as default and requires the -l flag to be passed to select line-in. E.g. for G711 encode, run

./encode -s audio.g711 -l

Best regards,

Vincent

0 TIG over 15 years ago in reply to Vincent W.

Intellectual 270 points

Thank you for your repeat.

I think there are three input for the voice in EVM.

1. MIC IN (default)

2. Line IN (-l)

3. M1

I want to use M1.

0 Sekhar Nori over 15 years ago in reply to TIG

TI__Expert 6385 points

Hello,

Looking at the schematics, the M1 input is connected directly to the DM365 via voice codec.

Unfortunately, the support for voice codec is not integrated into PSP 3.01 and DVSDK 3.10

However, the code is submitted upstream and you can see the support in Linus Torvalds's kernel here: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=sound/soc/codecs/cq93vc.c;h=a320fb5a0e26afefba683311539584a71c6ade7c;hb=86c65a7857896b1de99628ad392556965c4841e6

The patches as submitted on the mailing list are here: http://www.spinics.net/lists/alsa-devel/msg30906.html

Hope this helps.

Thanks,

Sekhar

0 TIG over 15 years ago in reply to Sekhar Nori

Intellectual 270 points

Thank you for your repeat.

I use DVSDK_2_10_01_18. But I didn't know the method of using M1.

● I changed AIC3101 into CQ93VC on the menuconfig screen.

● I want to convert the voice into mp3. The source code(audio.c) changed.

sAttrs.soundStd = Sound_Std_ALSA;

sAttrs.sampleRate = 8000;

M1 moved ! ! !

However, the time recorded in the file is different from actual record time. (It is different for about 1/10 seconds. )

The cause is not understood.

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microphone input(M1) in DM365EVM