All recordings are in 96kbps

[edewaal97]

I've tried several different settings, extension m4a or mp3, with bitrate at 128 (default) or 320 kbps, but all output are at 96 kbps. MP3 files recorded don't report the bitrate in Windows (probably because it isn't real mp3, but that is another issue #62). The M4a files report correctly, but show only around 96 kbps.

Listening the files back on my computer with headphones, I can clearly hear that high frequency tones are missing. This is a clear sign of a low bitrate. Looking at the Frequency Analyzer in Adobe Audition for example, it's clearly showing that there is no audio above around 16khz.

I did some testing in other recording apps, like https://play.google.com/store/apps/details?id=com.media.bestrecorder.audiorecorder That app has advertisements and isn't as user friendly, but the mp3 recording is a correct mp3 file at 128 kbps, which has noticeable higher quality than the recordings from your app (speaking of: the wav recordings from that app are absolutely horrible with a lot of static).

I'm using a OnePlus 5T running on the latest update from OnePlus.

[tibbi]

what app and OS version are you using?

[edewaal97]

5.6.4 and Android 10

[hollunder]

I can confirm that. The default settings in the app are m4a 128 kbps but if you look at the resulting file it is 96 kbps.