All FFT's need double precision - not

Article: PhysX87: Software Deficiency
By: Anon (no.delete@this.email.com), July 21, 2010 5:23 pm
Room: Moderated Discussions
EduardoS (no@spam.com) on 7/21/10 wrote:
---------------------------
>Ungo (a@b.c.d.e) on 7/21/10 wrote:
>---------------------------
>>24-bit mantissa is usually overkill there, too. It turns out that when you do
>>double blind testing, essentially nobody can tell the difference between 24-bit/192KHz
>>and the same audio sample resampled to 16/44.1. The few who can are young people
>>with truly exceptional high frequency hearing extending a little above 20 KHz.
>>
>>You could provide enough performance for such people with 48 KHz sampling. 96
>>KHz sampling is dumb, and 192K is absurd. 24-bit sample depth is... meh. There's
>>not much need for it, and the ADCs/DACs don't deliver true 24-bit dynamic range anyways.
>
>Get that data, pass on FFT, separate frequencies, apply distortion and emulate
>an 1969 amplifier, make popular actresses' voices look good and assembly everything to make a hit, is 16/44.1 enough?
>

As the target audience will be listening on mp3 or aac, I would say that yes, 16/44.1 is more than enough ;)

I find peoples concerns about frequency and dynamic range funny, as they have apparently never looked at the HF breakup modes of even good tweeters, the noise floors of listening enviroments, or the THD of real speakers ;)

Oh well, the bbc, back in the 60s and 70s recording days, would have killed for 16bit/44.1, probably 12/30 would have beaten a lot of their recordings - things we still hold up high these days.
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                All FFT's need double precisionVincent Diepeveen2010/07/19 02:02 PM
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                  All FFT's need double precision - notMichael S2010/07/20 01:16 AM
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    A bit off baseVincent Diepeveen2010/07/19 03:36 PM
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