Comment 10 for bug 1642105

The file encoding issues are probably unrelated, but

Warning [Engine]: SoundDevicePortAudio: Audio API provides invalid time stamps, syncing waveforms with a CPU Timer DacTime: 370.078 EntrytoDac: 0.0163333 TimeSinceLastCb: 0.0110719 diff: 0.00207285

is suspicious.

This message is issued form the DAC timing validation code. If the DAC timing provided by your audio API is valid normally, this massage can happen if the Engine thread is suspended, before it enters the Mixxx audio callback.

The "Warning [Engine]" itself makes the issue worse since this concurrents with all the other messages, this can take loooong since ther might be an other lock at writing the mixxx.log to hdd.

This message will be displayed only once per Mixxx run so not that big issue here.

Do you have more [Engine] entries?

I think I will enable this message only in developer mode ...