Thanks. The pitch detection is done by aubio library, but I rectify the signal before since that stabilizes the detection. By 'the 6th string' I assume you mean the lower pitched E string? Thats due to the longer waveform of lower frequencies which would need more frames per period to be detected. Low frequencies are a problem if the algorithm detects only the fundamental freq and not the harmonic comb (I dont know if its the case with aubio' yinfft algo). I had better results with a harmonic comb algorithm at lower freq, but I used the CLAM Audio suit for that. Sadly CLAM hasn't been updated for sometime (since 2010), so I scraped it. Maybe I'll extract the relevant parts of CLAM for GuitarSynth. Gerald On 21.04.2015 03:33, Gianfranco Ceccolini wrote: > FalkTX helped me with the QT4/QT5 issue and I got it working > > Nice to play around. Fast pitch detection and reliable in most cases. The performance drops a lot when using the 6th string though. > > Nevertheless, good work Gerald! > > Regards > > Gianfranco > _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user