PreenFM > preenfm2 and preenfm3

Using the PreenFM2

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martindunne:
hi there Xavier is there any way you can add a function to a button to make whatever value you are adjusting to go to Zero. And also would it be possible for the test note to play while previewing presets. cheers

Xavier:
Hi,


--- Quote from: martindunne on November 27, 2013, 06:38:12 PM ---hi there Xavier is there any way you can add a function to a button to make whatever value you are adjusting to go to Zero.

--- End quote ---

Yes : Menu button + turn an encoder.
Reminder : Inst  button + turn an encoder. Change the value 10x faster.



--- Quote from: martindunne on November 27, 2013, 06:38:12 PM --- And also would it be possible for the test note to play while previewing presets. cheers

--- End quote ---

Just added in 0.9g : you can use the left buttons (without holding "Inst") when previewing PreenFM bank preset or DX7 ones.

Xavier

martindunne:
cheers. another question, whats the difference between the normal and overclockes bin files, is it just the sample rate, and if so does it cause any other problems.
thanks

Xavier:

--- Quote from: martindunne on November 28, 2013, 05:23:53 PM ---cheers. another question, whats the difference between the normal and overclockes bin files, is it just the sample rate, and if so does it cause any other problems.
thanks

--- End quote ---

Good question, i don't remember if i wrote that clearly somewhere. I should start a FAQ.

The STM32F4 used by the preenFM is supposed to run at 168Mhz.

The "overclocked firmware" clocks the ARM microcontroller at 192Mhz.
I laveraged this speed to increase the sample rate from 39Khz to 44Khz.
The sound is not obviously better in low and medium frequency. But this allows the PreenFM to alias higher in frequency. So high pitched sound sound better.

There is no risk to burn your Microcontroller. The worst consequence would be a freeze.
I've never seen any problem.
I even hesitated to upload by default the overclocked version.

What you can do as a customer :
Flash the overclocked version. If it's OK, stick with it.
If you preenFM is unstable, flash the regular one.
Have them both on your USB drive and you'll be able to switch from one version to the other in 5 seconds. (Hold "Op" button while switching on).

Keep the question coming ;-)

Xavier

martindunne:
cheers man will do. been playing with it for a couple of weeks cant put it down. another thing. the left and right audio out, i am only using right out but its in stereo.

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