8 Jun
2014
8 Jun
'14
12:36 p.m.
Am 08.06.2014 11:49, schrieb Fons Adriaensen:
On Sun, Jun 08, 2014 at 06:38:50AM +0200, hermann
meyer wrote:
You're missing the point. Which is that the frequency info
*should* be used to decide how to map bins to a new frequency.
Also, it's easy to reduce CPU load by letting the whole thing
run at a quarter of the system sample rate. Which means that
for one octave down everything above 3 kHz is gone. But I guess
CPU load was not the only reason for doing that.
Ciao,
Without downsampling it use (well, 4xtimes more then now) 8% dsp load.
Most costs in the original source comes from that used values are not
pre-calculated.
But indeed, the reason for downsampling is that the limited frequency
range makes it sound good, and for guitar/bass 3kHz are far more then
enough when you would add a octave up/down to the original sound.
regards
hermann
>>
The whole part that finds the exact frequency by comparing
>> phases is completely redundant. This information is never
>> really used. It just looks as if it is used.
That's true, we could
leave that part out, that will spare us 0.2%
dsp load.