[sdiy] saw vs ramp, audible?

[Ben Stuyts]

Here is a Python script to generate some random non-/inverted sawtooth waves after each other in a single wav file, plus a text file saying which is which. You can play with the parameters in the script to change the sample rate, length of each sample, etc.

I have added a .wav file with 6 random sawtooth sections, each 1 s long and a pause of 0.5 seconds in between. (Had to keep it short to stay below 1 MB msg limit.)

Credits 90% go to ChatGPT. :-)

Ben

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numpy
wave

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Wave 1: Not inverted
Wave 2: Not inverted
Wave 3: Not inverted
Wave 4: Inverted
Wave 5: Not inverted
Wave 6: Not inverted
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> On 9 Dec 2024, at 17:13, Ren? Schmitz <synth at schmitzbits.de> wrote:
> 
> It's so easy to fool our senses. I do remember how back in school our chemistry teacher gave us a
> 
> vial of "Cherry Water" to perform a smell test. Only to later reveal that it was tap water. He drove that point home.
> 
> I smelled the cherries.  As did most of my class mates.
> 
> 
> This is how you hear the gold plating on the power cable. You hear what you believe you hear.
> 
> 
> I did try this with audacity, generate a 480Hz sawtooth (at 48k SR it's not too horribly aliased), and created an inverted copy.
> 
> I do perceive a difference, but maybe I'm sniffing the cherry water here.
> 
> 
> What you need is a randomized double blind test.
> 
> 
> Best,
> 
>  Ren?
> 
> 
> Am 09.12.2024 um 16:08 schrieb Chris McDowell via Synth-diy:
>> lol indeed there is...
>> 
>> That's why I asked here, I wanted the some good humor and some less crazy synth folks to agree with me! And sdiy list delivered, as usual.
>> 
>> Slightly more serious: What do we think is an easy enough way to play around with this?
>> 
>> Chris McDowell
>> 
>>> On Dec 9, 2024, at 7:50?AM, Roman Sowa <modular at go2.pl> wrote:
>>> 
>>> There is also a wealth of traffic online about how the color of the shrink tube placed on power cable supplying ethernet switch dramatically alters the sound of streamed music
>>> 
>>> Roman
>>> 
>>> W dniu 2024-12-08 o 22:15, Chris McDowell via Synth-diy pisze:
>>>> Falling saw vs a rising ramp, is the difference audible? What is the definitive answer? I have believed for years that the difference is not audible, that maximum disconinuity followed by minimum discontinuity is what a saw or ramp is, and inverted but otherwise identical waveforms sound identical. I came across a wealth of traffic online today arguing against that. I'm super skeptical. Folks' arguments were passionate but not complete in a way that could convince me. What is the real deal here?
>>>> Cheers,
>>>> Chris McDowell
>>>> ________________________________________________________
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>> ________________________________________________________
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> 
> -- 
> --
> synth at schmitzbits.de
> http://schmitzbits.de
> 
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