[Linphone-developers] Audio playback problems on Windows

[Max Feingold]

I have a desktop computer running Windows that has audio problems when using LinPhone. I’ve tried both the desktop version and the universal app from the store.

 

The desktop version only succeeds in playing audio using the WINSND option. The default WASAPI option does not work at all. Calls go through, but without playing any sound. Both APIs reference the same audio device in the multimedia dropdown menus.

 

The store version does not play any sounds at all, when pressing the numeric buttons or inside a call. My guess is that the store version is using WASAPI under the hood, and there’s no way to change it to use WINSND.

 

I can provide further information if needed; just let me know what might be useful.

 

Thanks.

 

The only relevant context I see in the debug window for the desktop app when using WASAPI is the following:

 

message: 2017-05-07 12:13:33:048 MSWASAPI audio input interface buffer size: 4000

message: 2017-05-07 12:13:33:048 Initializing speex resampler in mode [voip]

message: 2017-05-07 12:13:33:048 Initializing speex echo canceler with framesize=64, filterlength=2000, delay_samples=0

error: 2017-05-07 12:13:33:049 Could not decode base64

message: 2017-05-07 12:13:33:049 Initializing speex resampler in mode [voip]

message: 2017-05-07 12:13:33:049 MSOpusEnc: codec bitrate set to [30000] with ptime [20]

message: 2017-05-07 12:13:33:049 Setting opus codec bitrate to [30000] from network bitrate [46000] with ptime [20]

message: 2017-05-07 12:13:33:049 Initializing speex resampler in mode [voip]

message: 2017-05-07 12:13:33:049 Initializing speex resampler in mode [voip]

message: 2017-05-07 12:13:33:069 MSWASAPI audio output interface buffer size: 12000

message: 2017-05-07 12:13:33:069 Filter MSRtpRecv is already being scheduled; nothing to do.

error: 2017-05-07 12:13:33:069 no such method on filter MSWASAPIWrite, fid=16394 method index=2

message: 2017-05-07 12:13:33:069 MSVolume set gain to [0.000000 db], [1.000000] linear