[music-dsp] Re: Mastering correction by FFT-based filtering followed by 1 octave or 1/10 octave equalizer

2014-03-13 Thread Thilo Köhler
Hello ! What I would do (in this particular order): 1. Band pass filter from 60Hz - 12kHz to remove DC and low freq rumbling, If you want to optimize for Laptop speakers, you could raise the 60Hz to 200-500). The high cut is not necessary, but speech doesnt really require much more and you can

Re: [music-dsp] PSOLA pitch shifting - resample or not?

2013-11-05 Thread Thilo Köhler
Hello Michael! I've used the peak method before but it can result in choosing a positive side at some points and on the same basic syllable choose the negative side because the formant filter is changing. I seek the negative peak in the first deriviative. Depending on your recording setup,

Re: [music-dsp] PSOLA pitch shifting - resample or not?

2013-10-29 Thread Thilo Köhler
Hello! Question is what you mean by resampling. Resampling means, you go through the sample array and choose different sampling points than the original sampling points, and calculate values in-between, usually by using some kind of interpolation. Now, if you choose the distance between two

Re: [music-dsp] PSOLA pitch shifting - resample or not?

2013-10-23 Thread Thilo Köhler
Hello All! Resampling = pitching all frequencies including Formants, resulting in Mickey-Mouse or Monster voice. PSOLA: Use the vocal tract model, also called source-filter model, e.g. see here http://www.animations.physics.unsw.edu.au/jw/speech.html This model says, the voiced parts in speech

[music-dsp] Splitting audio signal into N frequency bands

2011-10-31 Thread Thilo Köhler
Hello all! I have implemented a multi-band compressor (3 bands). However, I am not really satisfied with the splitting of the bands, they have quite a large overlap. What I do is taking the input singal, perfoming a low pass filter (say 250Hz) and use the result for the low band#1. Then I