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Subject: Re: [yamahacs80] Square wave

From: "Max Fazio" <faxiomas@virgilio.it>
Date: 2005-12-02

 
Tim !You did a great job by making these samples!
I achieved similar results with a sample I grabbed from
http://personal.inet.fi/private/matador/cs-50_square.mp3
(44.1KHz, 16bit)
 
Look at the wave. Never seen such a strange square ( but is THIS a square ????). See below; anyway I would be extremely glad to work on your samples but my mailbox can't bear such attachments so I think it could be better if you can actually manage an FTP folder;-)
Thx again!!!
M
\"\"
----- Original Message -----
From: Tim Siefkes
To: yamahacs80@yahoogroups.com
Sent: Friday, December 02, 2005 4:25 AM
Subject: Re: [yamahacs80] Square wave

Okay.. to Max and ohesh (in Germany),

I have sampled the square wave output from my CS80 into a pair of .WAV files, sampled at 192,000 khz 32-bit resolution.

The first file is a ten-second recording of the lowest "C" at the 16' setting, the lowest ordinary note you can play on the CS.
The second file is about a five-second sample made after sweeping the pitch down on the ribbon controller to where it sounds like discrete clicks.
Filters were wide open, no modulation or outside effects were used.

Looking at these in my waveform display they do not look much like a square wave at all! I'm attaching a small screenshot of the waveform I see. Hopefully it will come through to the group. Do you want me to e-mail these files to you directly? These .WAV files weigh in at 7.5 MB and 4.5 MB respectively. I also combined them into a Zip archive which is about 8.8 MB for the two of them together. I don't want to overwhelm anyone's mailbox with large attachments. The other alternative is I could post them to an FTP location where they could be grabbed at your own leisure. Please let me know how I can best get these files to you.

-Tim S.
<Minneapolis>

Max Fazio wrote:
Thank you so much ! Correctly my friend Laurie wrote me that the audio result of the pure wave could be heavily affected by the actual settings of the filters' trimmers into each M-board.I'm aware of it and I will do my experience having the final results on a statistical shape.
I recently analysed the sine wave into the ring modulator and ended up with some correct datas ( or at least as less approximated as I could ).
Well, the sine wave I can hear into the modulation wave ( and in the PWM , SubOsc and within Chorus LFOs) isn't a plain sine: it consists of a "wrong" sine wave with a single harmonic tuned 2oct upper and with 4% of the total amplitude, I was able to reproduce it digitally with a common FFT generator : this implies the fact that , within ringmodulation there is something like a "hidden" sine which modulates the signal togheter with the fundamental at two octaves upper....that's why its sound is SO rich!!
Thx again for your help!
Max