The calculated error in the last step seems to get overridden again by new noise in the first step without further usage.

A huuuge noise floor, like someone is showering while recording. We realised, that the result is unacceptable. When importing, we need to reduce the quality, to make it fit into ardour. Ss->phase = (ss->phase + 1) & GDITHER_SH_BUF_MASK We converted from analog digital tape with a Tascam DA3000 to a high quality WAVE file. For example, the Gate on a microphone channel might only open while the singer is singing, preventing. I tried to look at the implementation of Ardour as a reference and I might be wrong there but I think I might have found a bug in their implementation: /* Run FIR and add white noise */ Gates are often used as a kind of noise reduction. noise reduction/quality preservation for spoken word material), then. Is this by design and once a signal is applied the loop generates continuous strong noise or just an implementation error by me?īecause by just using TPDF the noise disappears once the signal is silent again. For best results, if youre recording on Linux, record in either Audacity or Ardour. The problem that I have now is that once an audio signal is applied a constant noise is generated, even when the signal is removed again and the input signal is a constant zero. I implemented an FIR example noise shaping design as presented in „Minimally Audible Noise Shaping“ by Lipshitz from 1991. Besides voice activated recording, you can also use Ardour for audio editing. Pros: It is easy to understand, even for non-techies.

The results are quite good and now I’m trying to use noise shaping to decrease the perceptiveness of the noise in the target signal. Add echo, amplification, reverb, and noise reduction effects. To eliminate quantization noise I added additional TPDF noise to the input signal. I’m currently implementing a downsampling of audio data to 8 bit PCM audio. Does noise shaping always generate a constant noise?

Ardour noise reduction