MCP3008 sharing power supply with low-noise DAC
The DAC  uses a 1.7V LDO internal for the digital core and so you may share 3.3V and keep return paths isolated to avoid ground shift just in case of audio filter coupling.  But it creates its own V- charge pump for differential DAC output with 112 dB dynamic range.

Follow the layout and part selections and read all the fine print.

The 10 bit MCP ADC is unsuitable for audio recording but OK for simple sensors . You need a sigma-delta type 24bit ADC for Audio, but for simple 60 dB dynamic range sensors, no problem.

Without design criteria, specs, I can only give hand-waving recommendations if you follow their design.