https://devzone.nordicsemi.com/f/nordic-q-a/31067/thingy-audio-after-adpcm-decode-what-is-the-frequencyI have a windows side application and an Android App, both of which are set to capture data from the Thingy Sound Service. On the windows application, the data after being written to a file looks like 16kHz Audio. On the Android application, iten-USTelligent Community 13Tue, 06 Mar 2018 15:00:10 GMThttps://devzone.nordicsemi.com/thread/123108?ContentTypeID=1Tue, 06 Mar 2018 15:00:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b120ba8c-3e71-48a5-8534-9ef7c07557b0Jiajun<p>When you using the microphone on Thingy, the data stream will be 16bit*16kHz/4 = 64kbit/s (ADPCM compressed 4 times). After ADPCM decode (uncompressed) you get 16bit*16kHz=256kbit/s. When sending to Thingy speaker service data should be 8-bit*8khz = 64kbit/s (Uncompressed)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/122897?ContentTypeID=1Mon, 05 Mar 2018 18:01:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4dd01678-2a77-4c63-8488-b3ff11e2a359jublin<p>I&#39;m asking the opposite. When the Thingy sends to the app, and the app decodes through ADPCMDecoder, what frequency should the data be? I&#39;m seeing stuff around 8khz when graphing the audio data, but on the windows app side, the data saved appears to be 16khz.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/122851?ContentTypeID=1Mon, 05 Mar 2018 14:19:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a079a1d0-d39c-4fe3-9584-0b3e65326276Jiajun<p>The thingy firmware supports only&nbsp;<span>8-bit/8khz encoded. If the raw data is 16khz/16bit,&nbsp;the app will truncate it to 8bits and send it to the Thingy device.&nbsp;</span></p><div style="clear:both;"></div>