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thanks for the response, i am searching for solutions for a friend who needs to practice in headphones, and thought that i'd send my thought waves in this direction since if they don't use it, i could repurpose it and use it as a tinkering bench for various applications. what i want is a...

Looks good Blackaddr! A few questions for you: Do you sell shields that do not have all the 1/4" and MIDI jacks already connected? The reason I ask is for flexible enclosure form-factor reasons. Also, (edit) does the stereo out play well with headphones? One more question, is your shield...

sending register changes to a ym2612 and probably other things. i created a doozy of a thread about it already a couple few years back.

ok thanks Paul! I guess I should have looked for manuals before I asked that have the vague memory of doing that before and nothing like that existed or I could be wrong but thanks. I'm looking forward to having my head screwed on straight about using a microprocessor for something tangible...

What I do not know is how to tell Teensy programmatically that it is to see a certain number of pins as a port. Maybe this is found in a user manual I don't know maybe this is somewhere in a wiki. At my knowledge level everything is really decentralized in terms of information so it is very very...

i have a 3.1 and a 2.0++ that i bought to drive a synth chip. i didn't get it off the ground yet, but I was told that i could make my code simpler by using ports. i can find what pins go to what port, but what i don't know is how to activate one of those ports. ok, noted. cool, learned a new...

hi, is there some sort of reference material about creating "ports" with a teensy? i am told that i want to create a serial bus out of a certain number of pins. is this a standard arduino tactic that can be used on any arduino microprocessor?

Hi, too hard to find for someone trying to learn math, dsp and EEL2 at once. pls hlp? i forgot this information because i use the internet as an extension of my brain memory. i can´t locate this basic piece of information. where is it found in the documentation?

im trying to learn algebra2, trig, precal, cal, C, electronics, and reaJS at the same time so it's going slow.

main reason i'm keen on ym2612 and teensy is because I bought 5 * ym2612 and a teensy 3.1 and teensy 2++, but this whole endeavor brought down the house in terms of stuff I need to learn to even copy (in rote) the pre-existing designs.

oh wow is that the Preen? it runs on a Teensy type microprocessor?

ć I have a bunch of 7.6 mhz crystals. Two legs though and schematics on how to use or oscillate one is surprisingly scarce. No luck on google. I've seen these on pcbs all my life, but its one component that could use some how-to articles.

Actually the adblock thing was a misunderstanding, I was expecting stuff to be on the blank canvas like a prewired schematic, but there was not of course, and i figured out why: the stuff I was supposed to be looking at was in the module description pane.

hm, ok so now it's easy... gotcha. but the pages that you showed me have only blank sketches. no modules are displayed in the modular code designer windows. does that mean i don't need any code to get this to work? i disabled my adblock and I just have white squares where there should be...

thanks for your reply. wow, i don't know where to begin... I guess this needs to go in the program at the top. I will check the audio code generator page to see if this is generated by that. I am presuming this also is designated in the software I need to write. I'll look up...

Hi, I know what I have are two great products, the Teensy 3.1 and the Teensy 2++. However, I am still sitting on the outside of the walls of the awesome 24/7 rave that is microcontroller nirvana. Today I would like to put audio input and output on either the 3.1 or the 2++, Analog to digital...

to follow your design, i recall that there are some peripheral components. do i need that stuff or can this be done with only the Teensy 2++ and the ym2612 chip and an external mixer to amplify the DAC on the ym2612? also the crystal/clock i realize.

to get the envelope, isn't it basically a low pass filter, or in other words, reading one (amplitude) sample at an interval of (x) and averaging it with an arbitrary interval of samples (then convert to absolute value) and sending that to the 'envelope' variable that you require? Is it more...

looks cool!

arg. knew there could be a catch. i have a crystal, just dont know how to make it oscillate. but i do have a teensy 3.1 so i guess i can get it to do the job. im going to try this using your example. i forgot almost everything about this project since the only reason i bought a teensy was to...

so now i got a teensy 2++ and its been a couple months. so now it feels like im starting over from scratch. does anyone know what the general concept of the pins are in the 2++? i have the pic that shows what the pins are called. I had a clock generated on one of my pins on the teensy 3, can...

Just ordered a Teensy 2++ Hope thats the right one hehe

Resampling should prove useful if it would be musical, like if you choose a note, the selected grain would play back at that rate.

Are you trying to make it sample an incoming stream? Also it would be great to detect zero crossings so there is no useless aliasing, it might sound better than to use fade in and out on the window edges. I havent looked at the code yet, but im no code god.

what's the reason for reversing the prop? flying backwards? landing on a dime?

Funny enough, I started studying C++ for that reason, then a Arduino expert told me that Arduino is actually C. So that is a little confusing.

You need the Arduino program.

thanks! I wonder where I can look to understand how audio streaming works while other processing is occurring in a Teensy/duino. namely, how is a C program structured so there is a steady clocked stream of audio being output while varying dsp or other functions are being invoked. In other...

i want to make a very simple effect using audio in and out, mono analog audio input 1 mono analog audio input 2 0-250ms delay, (variable) soft clipper/limiter mono (or stereo) analog audio output of effected audio. is this possible using a Teensy 3.1? if so, or if not, what is the maximum...

That's what springs to mind. And some sort of crossfading between stretched chunks. The lowest frequency that would be needed by the algo is 80hz since that would turn into 40hz (below which isnt useful) . So 1/80 of a second might sound the best for a buffer size. 44.1k mono input would be...

i'd say that what's needed is to pass a certain number of samples into a buffer, and however many samples that is, ignore that many samples while what's in the buffer is sent to the output with interpolated data in between each sample (averaging). it might sound bad though, but maybe that's a...

i bought a not cheap encoder and it was giving me the same problem. even when i got it "right" the readings were far from accurate. probably a debounce needs to be in the code though. it's not teensy's fault though. there are just infinitely many encoder types, each with their own behavior.

i did do that by tweaking the hex in the melody array. but since i don't know how to write midi natively in hex, i gave that up after a few tries. one thing i noticed is that if i increase the value of those numbers, the sound goes lower in pitch, or at least i think that happened. i have...

well that did the trick! who knew? thanks again. i now have a melody coming out of the 'annoying doorbell' sketch (http://danceswithferrets.org/geekblog/wp-content/uploads/2014/01/sn76489_test.txt)

thank you very much! which one of these pins do you mean? or are you referring to the YM2612?

Thanks you both.

I am trying to get this code to work, without success. only a drone sound. i have changed my code to match pins after pin 3, which i used for the clock output. http://milkcrate.com.au/_other/downloads/teensy/SN76489_USB_MIDI_100/SN76489_USB_MIDI_100.ino i used the teensy clock, not sure where...

also, curious why this one gives errors: byte data; int WE = 10; int CE = 11; void setup() { Serial.begin(57600); DDRD = DDRD | B11111100; DDRB = DDRB | B00111111; pinMode(WE, OUTPUT); digitalWrite(WE, HIGH); pinMode(CE, OUTPUT); digitalWrite(CE, HIGH); } void loop() { if(Serial.available() >...

can someone try to compile this code?http://milkcrate.com.au/_other/downloads/teensy/SN76489_USB_MIDI_100/SN76489_USB_MIDI_100.ino I'm using a Teensy 3.1 which could be causing my errors, but i am trying to learn what errors come from what differences between teensys.

what about the assigning a voltage to a pin, what's the smallest bit of code to do that? p=high; ?

Video link:

yes, tried both pins, the 3.3v and the Vin pin. I don't have an audio vcc though, maybe thats why. i tried hooking a capacitor between the normal vcc and audio vcc though, which boosted the noise floor, but all i hear is the USB bus noises, the yamaha isnt making a peep. just tried 3...

that was mighty kind of you. do you have a ym2612 to work with? i have put pins places, the ym2612 gets warm so i know electricity is going into it. i have added little delays between all the events as well, since i got no response from the code. but i think you are on the right track...

greetings, I want a piece of code that looks like "0x1F" to be sent to 8 different output pins, each representing a place in the binary number that "0x1F" is presumed to represent. to rephrase for clarity, I want to make a physical 'copy' of a binary value manifest itself in the electrical...

what sort of information/numeric value is something formatted this way: 0x11 , 0x1F ? how can i change that into a signal that i can split into 8 bits and send each bit to the proper pins. im talking Teensy code.

i don't need a bus, i just need to put voltage on a row of pins that corresponds to a pattern that the YM2612 can use. in theory, it can use any pattern. i will begin by creating a 'blink' program that creates a random sequence of binary combinations and leave it running until it cries.

Edit: thank you for your effort! i am still currently unworthy but I'm sure it will be of immediate use to the right person, possibly me when i am at the right point in timespace to benefit directly. for now it serves as provenance to new questions, and that's good too. I looked on...

I already found full code for the SN76489 chip (but its not for the Teensy 3.1) https://raw.githubusercontent.com/brianmarkpeters/CHIP_BASED_SYNTHESIZERS/master/QUAD%20SN76489%20SYNTH/QUAD_SN76489_SYNTH_1_01.ino

thanks mlu! I will look at Ranix' code again to see if I possess the ability to identify the code that does that.

yeah i learned that the hard way :) anyway, about this thread, I posted in the 'general discussion' section and not the 'tech help' or 'project guidance' because what i had to say was more general than specific. i am finished with my tantrum now. i will be in the project guidance forum with...