[gmpi] Re: Ramps
- From: David Olofson <david@xxxxxxxxxxx>
- To: gmpi@xxxxxxxxxxxxx
- Date: Sun, 9 Jan 2005 12:51:50 +0100
On Sunday 09 January 2005 10.31, Jeff McClintock wrote:
[...]
> I suspect you are not comfortable with the small latency introduced
> by ramps. The inevitable result of obeying the rules of sampling
> theory. The alternative, jagged, stepped output (and also lagged),
> is far worse.
BTW, there is one more, rather serious problem with point events and
the line of thinking that usually follows: Unless you add a fixed
delay of at least one audio buffer, you'll actually *generate* random
jitter when feeding the events into the (audio driven) graph.
So, at least one audio buffer's worth of delay is required anyway, no
matter how dense the MIDI event stream is. Latency (within reasonable
limits) doesn't make softsynths unplayable, whereas jitter does, and
it doesn't take much of it when dealing with percussive sounds.
Finally, remember that sound doesn't travel all that fast... The
"magic" 3 ms correspond to the distance from your near field monitors
to your ears.
That said, the latency and jitter issues with softsynths is pretty
much only about NoteOn events and percussive sounds. Translating CCs
into ramp events isn't nearly as sensitive to latency, though it's
probably *more* sensitive to jitter, since timing jitter when
sampling a signal translates into noies on the value axis.
//David Olofson - Programmer, Composer, Open Source Advocate
.- Audiality -----------------------------------------------.
| Free/Open Source audio engine for games and multimedia. |
| MIDI, modular synthesis, real time effects, scripting,... |
`-----------------------------------> http://audiality.org -'
--- http://olofson.net --- http://www.reologica.se ---
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