[sdiy] In praise of the ATM STM32F303

[MTG]

In 20 years all the kids will be jonesing for synths from today for 
their "warm switching regular sound".

At least it's not micro-USB, but I still hate using USB connectors for 
power input.

On 2/12/2016 11:06 AM, Richie Burnett wrote:
> Charge pump generating higher voltage V+ and V- rails for the audio op amps from the Usb voltage input,
>
> -Richie,
>
> Sent from my Xperia SP on O2
>
> ---- MTG wrote ----
>
>> What the heck would the MAX232 be for?  The neg voltage? Debug port?
>>
>> GB
>>
>> On 2/11/2016 10:43 PM, Loscha wrote:
>>
>>> Markus Fuller just uploaded another of his great series of teardown videos.
>>>
>>> Today's victim was the Waldorf Streichfett
>>> https://www.youtube.com/watch?v=umXnCuVBwf0
>>>
>>> The entire synthesizer string machine is a single ARM STM32F303 chip.
>>> There is a power supply chip, an op amp for the audio outs, crystal, but
>>> the only computational device is the ARM
>>>
>>> http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1576/LN1531
>>>
>>> Notable for Audio considerations is that the DACs are 12 bit. Given the
>>> amount of beloved instruments that use 12 bit DACs, and the quality of
>>> this machine, it hardly seems a limitation.
>>>
>>> /Edward
>>>
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>>>
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