Is there any reasonable digital headphone amplifier with a FFT Equalizer?
Like a 8192-point FFT or so?
I'm asking that because currently I depend heavily on the 32768-point system-wide FFT Equalizer I use on Linux to equalize sound, in particular to equalize earphones (like my JBL T110 earphones), not only because of their own crappy response but also because my ears have quite differing resonances and sensitivities (when blocked), no earphone matches properly without separate equalization.
This equalizer module treats channels separately and there's an interface, qpaeq, which I modified to allow to write and read .csv files with all coefficients.
This makes manipulating data and creating curves very easy, so if I had a portable digital amplifier with a FFT equalizer I could just use my computer to create profiles for the device, and I'd be able to equalize any signal source with it.
Like a 8192-point FFT or so?
I'm asking that because currently I depend heavily on the 32768-point system-wide FFT Equalizer I use on Linux to equalize sound, in particular to equalize earphones (like my JBL T110 earphones), not only because of their own crappy response but also because my ears have quite differing resonances and sensitivities (when blocked), no earphone matches properly without separate equalization.
This equalizer module treats channels separately and there's an interface, qpaeq, which I modified to allow to write and read .csv files with all coefficients.
This makes manipulating data and creating curves very easy, so if I had a portable digital amplifier with a FFT equalizer I could just use my computer to create profiles for the device, and I'd be able to equalize any signal source with it.
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Usually that wouldn't be part of an HPA. It might be part of a DAC that drives an HPA. Probably more likely that any DSP would be done before a dac, either in hardware or software.
May I ask if you are looking for a battery operated portable device, or maybe for some other application?
May I ask if you are looking for a battery operated portable device, or maybe for some other application?
Can't see the max-FIR-taps limit in the data for that module, nor whether it supports fast convolution (FFT based) or even fast partitioned convolution (FFT based with low latency).