Hello everyone,
Excuse my bad English, this is a translation made with the Google translator ...
I am using win7x64-SP1 and a RME Babyface-Pro USB sound card.
For several months and even years I have noticed that mono files reproduce with a slight imbalance but did not give importance.
Today I discovered that it can be a bug in the ASIO output plugin (revision 7a) because using the WASAPI output plugin (revision 4) the playback is perfect.
To confirm all this I used this test file
0_16_96.wav 1 kHz sine, 0 dBFS, 16 bit mono wave file, 96 kHz sample rate downloaded from
http://www.rme-audio.de/en/downloads/tools. php # 5 in the following way and results:
1- I play it with XmPlay and ASIO output device -
Fireface USB. The DIGICheck Vector Audio Scope shows:

2- Now change to WASAPI output and the results are perfect:

3- To rule out that the problem is in the ASIO driver of my RME Babyface-Pro I now play the 0_16_96.wav in Samplitude_ProX3_Suite with the
ASIO - Fireface USB output, perfect result also:

Have any of you also seen this behavior?
Can anyone confirm that the ASIO output plugin (revision 7a) behaves that way?
Thanks in advance.
regards