[sdiy] DSP reverb ideas?

[Rainer Buchty]

> This talk about DSP, i have always whondered why that some of the
> biggies dont make a decent DSP (simple instruction set, minimal realy)in
> a SO14 package, blasting avay in 100Mhz controlled by a tiny SPI
> interface, and some 2 or 3 serial ADC/DAC channels! I wonder "WHY" they
> havent got their tumbh out??

Because it doesn't pay off for them to develop such a small DSP.

The SDIY crowd would most certainly love such a beast, but they don't buy
in large enough numbers to justify the development, testing, yet even the
manufacturing costs for an initial batch of readily developed chips. (If
we were, we could e.g. still get all CEMs, SSMs, SO42P, uA726 etc. from
our favorite distributors -- and these chips are dirt cheap compared to
the processes a DSP is fabricated in).

The low-cost home electronics market OTOH would probably create high
enough numbers, but there's not enough margin to justify the d/t/m costs.
Here, chips limited to a certain set of algorithms (e.g. the ones used in
average "sound processors") are used, which are either developed by the
consumer electronics company itself or just licensed from somewhere else.

With high-price home electronics, however, it doesn't really matter if the
used DSP costs $1 or $10. That difference will be paid by the end user
anyway.

And for modern telecom and networking the chip you describe is just way
too weak.

Rainer