Pro Freq Conv doesn't turn off for Wav

[bweeks_hcjb]

Hi Spoon,

After a couple of complaints from producers here at HCJB, I discovered that the Professional Frequency Conversion flag doesn't work for converting to Wav format. It's always on, it appears, whereas MP3, WMA and Ogg all convert noticeably faster when the flag is off. I had to revert to release 8d for one producer who prefers speed over quality :sad:

[Spoon]

Bug noted.

[daren]

Perhaps it's just me, but why would you want to turn it off??

I'd trade a little extra time for a big increase in quality any day...
The Windows ACM sample rate converter sounds awful especially
when the audio contains lots of harmonic signals.

Just my 2 cts ;-)

Daren.

[totalXSive]

Presumably if they were converting files but not changing the frequency? Or is there still an improvement even then? (in which case I may try running it turned on )

[daren]

Perhaps I'm wrong, but I thought the sample rate conversion
was not used when the sample rate is the same for input and
output streams.

It certainly wouldn't improve the quality in this case. The
improvment is relative to the sample rate conversion that
the standard Windows ACM sample rate converter does.

Another 2 cts deposited ;-)

Daren.

[Spoon]

It does nothing if the input and output frequencies are the same.

[bweeks_hcjb]

Daren, et al,

I lean towards only using the Professional Frequency Conversion myself, but I have generally found that for spoken voice, degradation due to using the Windows ACM conversion is not necessarily noticeable. In this case, our German Language Department had been using a process with the ACM conversion for a long time which they were completely satisfied with, that included a conversion to Wav at 22050 from BWF MP2 at 48000 via your Browser32 interface. After that conversion, they do some final editing and generate MP3 and Real Audio from Cool Edit for placement on the Internet. The low bit rates used for these final files far overwhelm the quality perception, I would think. So, for them, speed was still the critical factor.