Re: NSSound taper
Re: NSSound taper
- Subject: Re: NSSound taper
- From: Brian Willoughby <email@hidden>
- Date: Thu, 12 Jun 2008 17:02:45 -0700
On Jun 12, 2008, at 16:26, Glenn English wrote:
That's what I hear. And it seems like every time I want to do
something,
I end up bewildered by the core audio documentation. But he wants
it to
crossfade, he wants it yesterday, and I was trying to do a decent
job. I
think I'm at about the end of what I can do with NSSound, lovely as it
is for an mp3 player :-)
(Mac programmer newbie.)
Keep in mind that even the latest DJ mixers offer three different
curves for the crossfade, as does Logic. For crossfaders, it's more
what happens at the 'top' rather than the 'bottom' that really makes
a difference. That's because in the center of a crossfader, you're
getting two MP3s at 'full' volume. That makes the middle of the
crossfade louder than the rest. Some cut by 6 dB in the middle,
which works well if you have the same track on both sides, maybe with
different processing on each. Others cut by 3 dB in the middle,
which is a little more realistic considering that the audio on either
side of the crossfader is not going to be lining up perfectly. I
think there are even some other values for the dip in the middle,
depending upon how much of a boost is seen in the real world, and
what tames that best.
I'm no DJ, but I think they also offer linear and log taper as you
move away from the center. i.e. Crossfaders are even more fun than
regular faders or stepped attenuators.
Brian Willoughby
Sound Consulting
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