[sdiy] Sampler with tape dump?

[Roman Sowa]

There's no more truly random medium than "the air" and still QAM64 is 
doing perfectly fine there as in terrestial TV. 256 was maybe tiny 
exaggeration, althogh I'd be tempted to try it hoping for really good 
results if I cared anough.
Don't forget, we (as in "we, humans) have reached theoretical limit of 
56kbs in lousy 3kHz bandwidth of a phone line.

Roman

W dniu 2024-08-08 o 14:13, Mike Bryant pisze:
> QAM256 (or any other such technique) depends on a consistent, almost 
> predictable, level of noise.  I suspect cassette noise is truly random 
> so it would drop back to lower levels, in the end a single binary bit 
> and just get the speed we used to get.
> ------------------------------------------------------------------------
> *From:* Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Roman 
> Sowa via Synth-diy <synth-diy at synth-diy.org>
> *Sent:* 08 August 2024 12:44
> *To:* synth-diy at synth-diy.org <synth-diy at synth-diy.org>
> *Subject:* Re: [sdiy] Sampler with tape dump?
> Using modern modulation techniques like QAM256 one could achieve much
> higher throughput from a cassete. I wouldn't be surprised to see 200kbps
> of clean data after all correction stuff, so that 128kB Commodore loads
> in like 5 seconds.
> 
> Roman
> 
> W dniu 2024-08-08 o 01:19, Gordonjcp pisze:
>> On Wed, Aug 07, 2024 at 02:41:38PM -0700, brianw wrote:
>>> I seriously doubt it. The dump to tape would take so long that it would probably have a 100% chance of error. The size of a synth patch versus the size of a sample is quite a significant difference.
>> 
>> It depends. Home computers with as much as 128kB of RAM used tape for storage, so you could easily store an entire Ensoniq Mirage's worth of sample and program RAM to tape. Using standard ZX tape routines it'd take about 15 minutes to load or save, considerably  slower than floppy disk. Even using something like Speedlock would 
> only take that down to about 10-11 minutes.
>> 
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