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Small and cheap MCU with DAC
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wraper:

--- Quote from: Unixon on December 16, 2018, 04:25:06 pm ---These are computationally more powerful than STM32F03x but more expensive at the same time.

--- End quote ---
They are 8 bit, so generally they are slower than STM32F03x for computations. EFM8BB3 is 1.5-2x cheaper than STM32F03x depending on quantity.
Unixon:

--- Quote from: wraper on December 16, 2018, 04:36:05 pm ---They are 8 bit, so generally they are slower than STM32F03x for computations. EFM8BB3 is 1.5-2x cheaper than STM32F03x depending on quantity.

--- End quote ---
Oh sh*... I was looking at MHz column alone  |O

Well, then STM32F03x beats them on price and may very well beat them on performance.
wraper:

--- Quote from: Unixon on December 16, 2018, 04:39:59 pm ---
--- Quote from: wraper on December 16, 2018, 04:36:05 pm ---They are 8 bit, so generally they are slower than STM32F03x for computations. EFM8BB3 is 1.5-2x cheaper than STM32F03x depending on quantity.

--- End quote ---
Oh sh*... I was looking at MHz column alone  |O

Well, then STM32F03x beats them on price and may very well beat them on performance.

--- End quote ---
Where it beats them in price? STM32F03x is more expensive.
Wimberleytech:

--- Quote from: Unixon on December 16, 2018, 04:34:49 pm ---
--- Quote from: wraper on December 16, 2018, 04:19:00 pm ---What exactly is that audio?

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Oh, I'm sorry, I wasn't clear on that. I need a tiny sound effect generator/player and I'm looking for a MCU+DAC+firmware type of solution.
The sound quality is not a big question, from LPF filtered PWM to 8bit will probably be too harsh, but at least 12bit at 48kSPS is already OK.

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http://keterex.com/pubs/kx1400br.pdf
Unixon:

--- Quote from: wraper on December 16, 2018, 05:05:17 pm ---Where it beats them in price? STM32F03x is more expensive.

--- End quote ---
At my local supplier, however, this strongly depends on which chip it is, price ratio could go both ways.
STM32F031F4P6 is about $1-$1.5 in volume other chips range up to $2-3.
EFM8BB31* well ... is about the same range in volume.
For low quantities locals want like 5-10 times of volume price for top of the line chips.  :rant:
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