This Newby is perplexed in hunting for a landing spot for these highly related subjects, from among your terrific collections. Maybe the ARM topic was the closest. The ARM Wiki states that as of 2009, an amazing 90 percent of portable devices are employing ARM and most include DSP. But when I deploy SEARCH here for DSP or AUDIO I get zero hits.
I need a $10 or $20 dedicated DSP chip, DMA coupled to a host controller and Muxed ADC with 16 or 18 bit resolution. Also some hi resolution DAC. All good basis for lab or instrument applications. Availability of support software is crucial item. Any joy?