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I am using a gain of 5 on both channels which probably amplifies even more this "defect".

Silly me! Using quad packages for the amp are not a good idea if you want good seperation between the 2 channels. I switched the TL074 for 2 TL072 and the crosstalk is completely gone. I learnt that lesson!

I have a hardware question/issue with the PT8211. I got it to work and playing audio files from a sd card, sounds good. But I am experiencing a lot of "bleeding" from one channel to the other. I mean for instance, I can hear the left channel in the right channel, when the right channel is...

thanks! I overlooked those things. I will try right away.

Hi, I read on the IntervalTimer page that it's working only on Teensy 3.0. It seems that I can begin the function but I can't end it with .end(). Is this a known issue ? I am building en enveloppe generator for a modular synth. I am testing now with a switch, when I press the switch I start...

by updating only 1/4th of the screen at the same time, I got the timing down to 4ms. I added a another variable to the .display() function, a line variable, so I can choose where I want to start displaying, I also divided by 4 the amount of data being sent. changes in the library .ccp file...

Thanks for the new input. I modified the code to update the screen only when something changed. And things are going great, almost perfect.

Fantastic. I did that, so removed TWBR definition from the Adafruit_SSD1306.cpp file. And added Wire.setClock(1000000);, AT THE VERY END of the setup (). When I placed it just after Wire.begin() at the beginning of my setup it didn't helped. I guess some definition somewhere in the setup were...

Making some progress! When I tried to use the Adafruit SSD1306 with the i2c_t3 library I commented the TWBR = 12; definition, in order to be able to compile it. I was using as start up code : Wire.begin(I2C_MASTER, 0x00, I2C_PINS_18_19, I2C_PULLUP_EXT, I2C_RATE_400, I2C_OP_MODE_DMA); Now I...

other interesting thing, according to this thread from 2012 : https://forums.adafruit.com/viewtopic.php?f=47&t=29918 Updating a SSSD1306 via I2C should take 54ms (so 54000micros) on Leonardo at 8Mhz. Altough the I2c timing is still 400hz I could still expect shorter timings due to the Teensy...

The timing is : 109200 microseconds! This is what I get on the serial monitor with this code elapsedMicros since_screen = 0; display.clearDisplay(); display.setCursor(0, 0); display.println("test"); display.display(); Serial.println(since_screen); When I comment this line ...

Thank you Paul, I'll try this right away and report my findings!

Hi guys, I am really getting hopeless here… The project in a nutsheel: - 8 rotary encoders via a MCP2307 -> using interrups pins - 8 SSD1306 OLED screens (with all the same adresses) via TCA9548A I2C mux The teensy + MCP2307 + TCA9548A are placed on a central “brain” board and the encoder +...

ok, more news. my client having the problem reported still having issues in EL Capitan but the device was working fine on windows. I connected remotely and installed ARduino+ Teensyduino 1.26 and reuploaded the firmware on his computer. and the problem was solved, so it seems that Teensyduino...

Problem solved! I did this : Reboot and press CMD+R immediately after hearing the startup sound to boot to Recovery Mode Open Terminal Execute the following command: csrutil enable --without kext Reboot Some arduino users had the same problem ...

Hi, I have experienced problems using a teensy LC-based MIDI controller I am building. As soon as the OS (El Capitan) is fully booted, the teensy seems to be frozen, no reaction to inputs or outputs whatsoever. But just when it gets power from the computer before El Capitan is fully booted...

Hi! I am planning to use the traditionnal non-usb library with the TeensyLC. https://www.pjrc.com/teensy/td_libs_MIDI.html I am wondering which parameters of the circuit are changing for the LC ? It uses the RX&TX pins, so on the LC pin 0 & pin 1 I suppose ? For the output, should I also get...

Do it! it's great fun. Good one about the pitch bend messages. Some DAW forces certain MIDI messages to certain DAW parameters. I would have to check if the pitch bend would not be automatically send to the plugin or track pitch bend... It probably would. Logic would not let me use messages and...

I use the Bourns PTA : http://www.bourns.com/data/global/pdfs/PTA.pdf 10kohms, 30mm travel length, 15mm long metal lever.

Hi guys, So this what I whish to do. A drum sequencer with 8 rows of 16 steps so 128 knobs and leds. Basically something like this but with sound generation on board : https://www.youtube.com/watch?v=gCeh_7UIcXs I thought of a led matrix with this : http://www.adafruit.com/product/1427. It's...

Hi! It's about time I show you what I am working on with the awesome teensy boards. I am building MIDI controllers especially laid out for software synthetizers. At the moment I have 2 products ready. The SFC-60 is a custom controller for a Juno-60 styled software-synth...

Hi Paul, do you think that Teensyduino-generated hex files could be uploaded to a 32u4 (with the original atmel bootloader) using Atmel flip ? Or within the Arduino IDE with an UNO as ISP or a similar programmer ?

Thank you so much for confirming this Paul, it works out now and it's all going smooth.

that makes sense. thank you MuShoo.

I've noticed something strange. After changing the MIDI device name on Teensy's 3.1, it doesn't load the sketches properly anymore. It requires to press the reset button everytime when uploading. Anybody experienced that before ? Any idea how to avoid that ?

Hi paul, Yes I am using your adapter. Sorry for the typo, I meant 7 and 14. Thank you for the specifics. Very handy.

Hi guys, Does anybody know if I can re-claim the SCLK and MOS pins, pins 4 and 7, if I am not using the SD slot for playback audio ? I'd need them for muxes and shift registers. Are there any other pins on the audio adapter that are optional or that could be share with the audio adapter ...

thank you paul, that fixed the problem.

He guys, I got my teensy 3.1 and audio adapter running. I can upload my usual non-audio code. But anything audio (examples) won't compile. The SPI library seems to be the problem. Any clue on how to fix it ? Any audio example gets my this kind of error : This report would have more...

Hi everybody, I am working on a MIDI controller project with the Teensy 3.1. I'd like users to connect to the controller into a sturdy USB-B connector like most commercial products. I don't want to have to connect the small micro USB right into the computer. So I need to bridge the micro usb...

Hi Paul, Thank you for confirming that my circuit is correct. As I already ordered my PCBs for this project, I looked it solving this in the software. Averaging 5 consecutive readings seemed to have fixed the noise problem. for (int i=0; i<5; i++){ SmoothRead1 = SmoothRead1 +...

Hi guys! I am using about 3 CD74HC4051 chips for a MIDI controller project. There seems to be quite some noise at the inputs of the ADC. I have to filter a lot to stabilize the signals (i am not registering any changes under 20 - on the scale from 0 to 1023). I realized I connected all the...

Actually I am not sure where to find that information ? Is it the percentage value in the teensy window ? That says 10%.

Thank you so much for your the details! I'll read this and the code.

Hi there, For my second teensy project I went for a Audio Meter for my home studio. I got a Teensy 3.1 and the audio adapter, soldered 2 jacks and plugged them on 2 audio outputs on my audio interface. Using my interface software/mixer I route the signal I want to meter to the teensy. Using 2 x...