Search found 6 matches

by xyx361100238
Mon Mar 20, 2017 5:10 am
Forum: Voice & Conferencing
Topic: Use USB Audio 2.0 Record by Frame
Replies: 1
Views: 7342

Use USB Audio 2.0 Record by Frame

Hi,All According the Microphone array library V2.0.0 manual,if i set MIC_ARRAY_MAX_FRAME_SIZE_LOG2 = 9 buffering_type = DECIMATOR_HALF_FRAME_OVERLAP in decimator_config_common. Now I got 512 samples by Frame, but i don't know how to sent it to USB,there is not demo code in website. code: while(1) { ...
by xyx361100238
Mon Dec 19, 2016 3:55 am
Forum: Voice & Conferencing
Topic: Can 1.536MHZ PDM clock generate 16kHz output sample rate
Replies: 2
Views: 8887

Re: Can 1.536MHZ PDM clock generate 16kHz output sample rate

THX,andrew
According to your cmd,I generate a filter divide by 3,and it works,thx a lot.
by xyx361100238
Thu Dec 15, 2016 4:25 am
Forum: Voice & Conferencing
Topic: Can 1.536MHZ PDM clock generate 16kHz output sample rate
Replies: 2
Views: 8887

Can 1.536MHZ PDM clock generate 16kHz output sample rate

Hi, all According the Microphone array library V2.0.0 manual,feature 1&2: 1、48kHz, 24kHz, 16kHz, 12kHz and 8kHz output sample rate by default (3.072MHz PDM clock), 2、44.1kHz, 22.05kHz, 14.7kHz, 11.025kHz and 7.35kHz output sample rate by default (2.8224MHz PDM clock) Is this means I cann't gener...
by xyx361100238
Wed Dec 14, 2016 12:27 pm
Forum: Voice & Conferencing
Topic: How to reduce CLK frequency of PDM
Replies: 3
Views: 9636

Re: How to reduce CLK frequency of PDM

Hi, John I was reviewed the applications notes (AN218 to 220),not found the point about CLK frequency,if I missed something,please let me know.My request is very simple, just wanna down CLK frequency(defualt 3.072) to 1.536(half of it),please check the attachment。 If I missed, please give me the cod...
by xyx361100238
Wed Dec 14, 2016 10:49 am
Forum: Voice & Conferencing
Topic: How to reduce CLK frequency of PDM
Replies: 3
Views: 9636

Re: How to reduce CLK frequency of PDM

Thx,johned
I'm working on it.
by xyx361100238
Mon Dec 12, 2016 4:31 am
Forum: Voice & Conferencing
Topic: How to reduce CLK frequency of PDM
Replies: 3
Views: 9636

How to reduce CLK frequency of PDM

Hi, all: I Use Microphone array library V2.0.0, 16KHz output by default (3.072MHz PDM clock),now I wanna down CLK frequency of PDM to 1.536MHz, as 16KHz output by 1.536MHz PDM CLK. I tried: 1、configure_clock_src_divide(pdmclk, p_mclk, 2) ——> configure_clock_src_divide(pdmclk, p_mclk, 4); 2、 configur...