RE: audio delay node max delay time

> So the AudioContext createDelayNode() method could take an optional max
delay time which is greater than 1 second.  
> Although this value could be somewhat greater than 1 second, we may want
to consider some reasonable (but large) 
> upper limit, since it does consume memory.

 

Figuring out a good upper limit seems not easy to me. If I get it right, for
one second 48000samples x 4byte(float) = ~187KiB of memory is needed for
storing the delayed samples. If we set the limit to 100 seconds, a delay
node will need about 18MiB for storing the delayed samples. That’s too much
for mobile phones, but not that much on workstations. (In general) I think
the limit should be device-dependent. Using a device-dependent limit means
that the developer/script needs to know about it.  Therefore an additional
function or return value is needed.

 

But do we really need a delay node? A JavaScriptNode can also do the job.
Maybe some additional operations on AudioBuffer would be handy for
processing the delay (e.g. inplace copy).

 

(I hope my memory calculation is correct and I have no error in reasoning
there)

 

Regards,

Michael