[zmix]

Hi Sean,

Originally Posted by seancostello

Nice sound files! Thanks!
To me, the 100 Hz tones all sound like delay modulation is used, even the PCM96 algorithms.

Have you ever listened to a Bode Frequency shifter? There is a fair example in the Logic built in plugins calld "Ringshifter" if you set the modulation oscillator to 1.5hz or so the effect is very close to the what the modulation on the PCM96 "Hall" and "Random Hall" sounds like. In the examples above I find that the Piano sounds like DX-7 when run through the PCM96. This is quite different from the delay modulation you can hear in the PCM96 and PCM-70 "Concert Hall" example.

The PCM96 Concert Hall has a very repetitive chorusing sound when heard this way. Random Hall sounds more random, and the PCM70 Concert Hall sounds somewhat random as well, although this might just be a more complex modulating waveform.

Yes! In the PCM-70 the oscillator is a mixture of a 2.3hz triangle wave and a much slower random waveform (around 0.5hz) This creates a magical quality in the tail of the reverb that I cannot duplicate in the PCM96. The chorusing LFO in the PCM96 sounds like a square wave and has a maximum rate of 1.5hz. It is not randomized.

I am surprised how different the PCM70 Concert Hall and PCM96 Concert Hall sound. The PCM96 is very obviously chorused on the piano example - not just chorused in the recirculation, but chorused outputs. Did the 224 Concert Hall sound like this? If so, it sounds like the PCM70 Concert Hall is considerably different than the 224 algorithm of the same name. Huh.

I spent DAYS trying to get the PCM96 to create the lush magic of the 224 "Concert Hall" algo. It's the only reason I bought the PCM96. The 224 "Concert Hall" sounds virtually identical to the PCM-70 and sadly not so much like the PCM96. I borrowed a PCM-70 and had the results I sought in seconds. I have a later generation 224xl on it's way here and shall post my results when that arrives so that you can hear the difference.

There is certainly a very important difference in the where the modulation occurs in the PCM96 and in the 224 / PCM-70. In the PCM-70, for example the modulation becomes much more pronounced when the taps are spread out by increasing the 'attack' parameter.

I posted these files because I would like to open a dialog with those here who share my obsession with all things reverb (i.e. Dale, Sean and Casey, etc).

Let's discuss!