"Jim Lesurf" wrote in message

In article , Iain
Churches wrote:

Also, you can delay the reverb or reverb the delay.
Totally different.

Could you explain that. Not clear to me what you mean.

Iain's statement seems hard to make sense of if you understand how reverb is
simulated.

Linear processes usually commute even if not invertable.

I think that Iain is making a distinction between simple delay (one time
step and no feedback of delayed information) with common implementations of
reverb which can involve multiple time delays and the addition of some
feedback of delayed information.

The earliest artificial tape reverb involved only one delay because tape
machines of the day had only one playback head, but could have easily
involved feeding back delayed information from the playback head to the
record head.

The number of playback heads used is an important variable. It comes closer
to simulating what rooms do than using just a single head.

The first dedicated tape reverb machine that I ever saw had multiple
playback heads, maybe 5 or 6. This probably came a lot closer to simulating
what real world reverberent rooms do.