I assume that foobar's built-in EQ outputs in 16 bit?

That is obviously far from desirable, especially if you are attenuating some frequencies by 6dB or more.

Is there a pro-quality plugin which produces corrected data in 24 bit?

What makes you think so? The standard equalizer uses 32 bit floating point numbers.

You assume wrong. foobar2000's equalizer is 32-bit.

EDIT: misread the question. Yes, the EQ is 32-bit.

Do you mean 32 bit internal resolution, or 32-bit/44.1kHz output?

See "prefereces->playback" at the bottom of the page "audio processing pipeline".

- Lyx

I mean the eq has 32-bit internal resolution, instead of 64, which is the standard pipeline bitdepth.

Thanks for the replies. Much appreciated. I didn't know about the pipeline, and variable bit-depth of output before. Very interesting!

There's something else bugging me with the built in EQ. "Only" 55 Hz. I'd like to try to boost the area below that, e.g. 20 to 40 Hz, since my subwoofer gets a bit weak below 40 Hz. Any alternative? Why offer only 55 Hz?

Because a "simple" equalizer is more easy to use and fits 99% of the users needs?

Nothing prevents you from making one with more options, more frequency ranges, or whatever, but there is no need to confuse users by default.

PS. An equalizer works with ranges and doesn't boost a single frequency. So the first slider will affect all <= 55Hz frequencies.

Ok, can understand that.

Haha... I would love to, if I could But maybe someone has done that before?

Aye, but I would prefer to boost the range below 40 Hz only.

Use foo_convolve with a fitting impulse.