I am using Audacity 2.0.5 out of the box. I would like to use a bandpass filter (with a steep slope to make it quite “watertight”). I notice that there is a low-pass and a high-pass filter provided but cannot find any bandpass filter(s). Is it possible to get a bandpass filter in audacity? Any advice would be just great,
You can create bandpass filtering by applying both a highpass and a lowpass filter.
For example, if you wish to pass the frequency band between 400 Hz and 4000 Hz, then apply a highpass filter at 400 Hz, then a lowpass filter at 4000 Hz.
Thank you very much. Yes. I thought of that too but was hoping there may be a plugin or a ready-made effect that would allow multiple bandpassing e.g. 0-320Hz (ok… LP if you like), then 2,400Hz - 2,600Hz then 10KHz - 15KHz. These numbers are just illustrative - not what I am really trying to do.
I thought of using an equalizer but the filters are not steep enough and allow too much leakage.
If 20 dB attenuation in the stop band is sufficient, then you could use the “Graphic EQ” effect (in Audacity 2.3.3). The Graphic EQ should be accessible for VI users.
If you require more attenuation than that, then you could use the high pass and low pass filters (lower down in the Effect menu).