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Post by rodney on Aug 29, 2019 2:09:47 GMT
Here's the start of a general thread in which to collect resources around the use of the Teensy series microcontroller boards for DIY synthing. For those new to the Teensy, it is a range of arduino-like boards that have gutsier processing capabilities and a few other useful things that make them fun for audio.
You can set them up to use the teensyduino libraries for the arduino environment and there is a version of the Mozzi libraries for making synths.
For 3.xx Teensys, the audio board makes a great addition. www.pjrc.com/store/teensy3_audio.htmlThere is even a ready-wired kit on breadboard to go along with their audio tutorial www.pjrc.com/store/audio_tutorial_kit.html
The tutorial video talks you through their audio library and its neat graphic interface to help generate code by patching wires on screen (not realtime like PureData etc., but still handy to save a lot of typing and remembering stuff)
The newest Teensy 4 looks awesome but will draw a bit more power than the 3xx series. There will be a modified audio shield for it in a few weeks.
The 3.2 seems to be the sweet spot for features and price. It has a 12bit DAC and other goodies.
If you are not so much crunching audio but making sequencers etc, maybe the Teensy LC is a cheaper way to go.
These boards are 3v not 5v so you'd need to add components to sort that out.
once my AE arrives in a few weeks, I'll definitely set up a teensy module to mess with and share it here.
I'll dig up more resources and paste them in here a bit later.  |
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Post by timb0bsteve on Sept 6, 2019 11:29:48 GMT
The Teensy 4.0 looks awesome and seems to have a massive speed boost. Do you think the higher power requirements will make it unsuitable for AEM use, or will it still be possible?
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Post by rodney on Sept 6, 2019 21:43:29 GMT
The Teensy 4.0 looks awesome and seems to have a massive speed boost. Do you think the higher power requirements will make it unsuitable for AEM use, or will it still be possible? At first glance, it would depend on what else you have in your rack, and how many of said racks off the one power brick. I'd let robertlanger make the authoritative pronouncement on this, however, I would imagine, it might simply be a matter of using a 9v adapter with a higher amperage/wattage rating. |
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eric
New Member
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Post by eric on Sept 16, 2019 5:07:04 GMT
Inside the Master module there is some kind of voltage regulator to go from 9V to 5V.
It's specs will define the maximum current you'll be able to draw, even if your p-brick can supply more.
Anybody know's the max current that regulator can handle (both electric and heat dissipation inside the small AE enclosure) ?
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Post by rodney on Jan 19, 2021 21:32:39 GMT
Just to bring this thread back to life: an entertaining presentation of why the Teensy boards are worth a look
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Post by rodney on Jan 19, 2021 21:41:26 GMT
I have some mcp6002 opamps arriving soon. First project will be to convert the line-level output from the Teensy audio shield to a proper AE signal.
After that, I'll make a converter to drop the AE signal to input to the Teensy. Then I can have fun with the Teensy Audio Libraries in the context of my AE synth.
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Post by timb0bsteve on Jan 19, 2021 21:45:00 GMT
Are you using a Teens 3 or 4?
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Post by keurslagerkurt on Jan 19, 2021 23:58:57 GMT
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Post by rodney on Jan 20, 2021 3:53:49 GMT
Are you using a Teens 3 or 4? I have both but have not tried the 4 yet. I am also ordering a 4.1 for the SD card slot.
I have the PJRC audio boards for both 3 and 4 series but am thinking to try to work just with a DAC . There is a built in DAC in some of them that is not too bad but feels a bit underpowered for the kind of stuff the Teensy can do.
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Post by rodney on Jan 20, 2021 22:55:49 GMT
The Teensy 4.0 looks awesome and seems to have a massive speed boost. Do you think the higher power requirements will make it unsuitable for AEM use, or will it still be possible? The Teensy 4.0 and 4.1 both draw about 100 mA when running at 600MHz. Less if you underclock it.
I can't find and hard numbers for the Teensy 3.*** series but I assume they would be less and that the Teensy-LC would be considerably less. |
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Post by timb0bsteve on Jan 20, 2021 22:57:39 GMT
I have a Daisy Seed board, but I'm so nervous to try doing anything with it as it's a 3.3V and I'm scared of frying it :-P
I've got "Arduino for Musicians" on the way and I'm hoping that can help get me started on some DIY stuff.
I have an old Teensy 3.1 somewhere too... Maybe that would be safer.
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Post by rodney on Apr 9, 2021 8:23:07 GMT
A nice circuit from beatstick (thanks heaps!) for re-scaling the audio line out from the Teensy audio board for feeding to an AE module: |
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Post by rodney on Apr 9, 2021 8:26:50 GMT
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