--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Mon, Apr 17, 2017 at 7:26 PM, GaCuest gacuest@gmail.com wrote:
El 17 de abril de 2017 a las 14:30:27, Luke Kenneth Casson Leighton (lkcl@lkcl.net) escribió:
Why not use the STM32F072 for audio on the laptop?
not good enough dynamic range and quality, and it is still necessary to have a amplifier. i tried doing audio on an STM32F103RBT6 - i learned that it would not be enough. i *almost* managed it though.
Could you use one (poor quality) speaker for the STM32F and when you connect an EOMA68, could you use a CM108AH with one (or two) good speakers?
might be a bit awkward, multiplexing the analog power-pathways (the CM108AH drives its outputs @ either 100mA or 500mA) but it's doable.
the other alternatives are:
* to add a proper I2S audio driver IC (from maxim for example). however as these typically include a tensilica DSP (tensilica have over 1 billion licensed sales of their DSPs, mostly in audio ICs) they're typically relatively costly.
* to drive something like a CM108AH directly from the EC. this gets... a little hair-raising with the USB paths.
* to find an alternative EC.
l.