The TGA Pro from Blackaddr Audio is the ultimate platform for learning and prototyping digital audio effects. The combined Two-Channel Audio and MIDI shield makes designing your own audio effects and digital signal processing as easy as possible.

WE ARE CURRENTLY OUT OF STOCK WHILE WE TRY TO FIND ALTERNATE SOURCES FOR LONG-LEAD TIME PCB COMPONENTS.

It's unclear when I'll have new inventory back in stock, as I will likely need to modify the board for a new codec. In the mean time I suggest you consider a google search for the "Aviate Audio Multiverse" as an alternative. It is built using a custom version of the TGA Pro and Teensy Micromod and supports both the usual Teensy developments tools and BALibrary as a DIY effectsplatfrom in addition to the fully graphical Multiverse mode.

ATTENTION EU/UK BUYERS: shipments have been temporarily suspended due to changes in VAT requirements. Tindie as an online marketplace is required to legally collect VAT which it is unable to do at this time. .

Orders are batched and shipped out once per week.

It is recommended to buy a Teensy 4 if you do not already own a Teensy 3 you wish to re-use.

TGA Pro Key Features:

• Compatible with Teensy 4.0, 4.1, 3.6, 3.5 or 3.2.
• Isolated, analog power supplies for CODEC and preamp are generated using power from Teensy USB.
• Overall +24dB to -34.5dB of user-controllable input gain/attenuation.
• 2-channel input, 2-channel output configuration allows you to process stereo guitar pedals (such as reverb, chorus, etc.) correctly, or create your own mono-to-stereo effects.
• Standard 5-pin MIDI input and output connections for use with the Arduino MIDI library
• Optional 64 Mbit SPI RAM for external data storage (ideal for longer delays and loopers!)
• Optional expansion board to add physical controls
• Optional analog dry output jack passively splits the output of the analog preamp (input to CODEC)
• GPIOs available on user-installable expansion headers.
• 1 user controllable LED.
• Overload protection circuit for CODEC analog input.

What sets the TGA Pro apart from other boards is it's specifically designed for connecting a wide range of audio sources. Onboard high-impedance preamps with adjustable gain permit direct connection of guitars, guitar pedals, or line-level sources using full size 1/4" jacks. High-quality audio-grade components are used throughout the signal path as well as onboard power circuits provide all the necessary voltages from the USB 5V. Full technical details can be found in the datasheet.

WHAT IS TEENSY?

The TGA Pro leverages the popular Arudino-compatible Teensy 3.x and 4.x series microcontrollers from PJRC. Arduino-compatible means you can use the same software development libraries and tools as literally millions of other developers around the world. Teensy takes Arduino one step further by offering much higher performance microcontrollers in a tiny form factor that is perfect for makers to use in their own custom projects.

The TGA Pro is compatible with Teensy 4.0/4.1/3.6/3.5/3.2. The Teensy 4.0 or 4.1 is recommended for it's fast processing speed (600Mhz) and generous Flash and RAM memory.

The heart of Teensy audio is the Audio Library by Paul at PJRC. This library allows simple connections between audio blocks while handling all the complicated audio transfer work.

HOW DOES IT WORK?

TGA Pro provides an audio CODEC and surrounds it with all the necessary jacks, preamps, power, input and output circuits for a ready-to-use audio processing platform. Blackaddr Audio has extended the PJRC Audio Library adding more custom effects examples and re-usable audio primitives to make building your own custom effects even easier. The entire platform is powered and programmed from a single USB cable attached to your computer. When you're ready to install in a custom enclosure, you only need to provide a 5V power source.

ORDERING OPTIONS

Several ordering options are available to further enhance your project.

Socket Adapter / Breakout

Two add-on options are available:

• T4.1 Breakout Board - this PCB provides a 48-pin socket for your Teensy 4.1 breaking out most of the pins on the device, including the ones not utilized by the TGA Pro. Ideal for custom projects with lots of switches, knobs, LEDs, etc. Includes an extra bare breakout PCB so you can solder a Teensy directly to it if desired for minimum height. NOTE: You can still use a Teensy 4.1 directly into the T4.0 socket leaving the extra pins unused. See the Users Guide for details.

• T3.X Adapter / Breakout Board - this PCB is necessary to use any Teensy 3.X series device with the TGA Pro. The adapter remaps the pins to be compatible with the Teeny 4 socket on the TGA Pro. Additionally, most of the pins on the device are broken out, including the ones not utilized by the TGA Pro. Ideal for custom projects with lots of switches, knobs, LEDs, etc. Includes an extra bare breakout PCB so you can solder a Teensy directly to it if desired for minimum height.

EXTERNAL SRAM

The TGA Pro has can be optionally ordered with 64Mbit of external RAM available on the SPI0 bus.

What's external RAM used for? Many audio effects require delaying audio (delay, flanger, double-tracking, etc.) or storing other large realtime data like waveshaping tables for distortion. Delaying audio requires buffering large amounts of raw uncompressed audio data in buffers which consumes large amounts of RAM. By using external SRAM for this data, longer delays can be achieved while keeping the on-chip microcontroller RAM free for running your program. With one 64Mbit SRAM, audio storage of approximately 95 seconds can be achieved. NOTE: this SRAM is for external data storage. It doesn't increase stack memory in the processor.

EXPANSION CONTROL BOARD

This board plugs directly into the TGA Pro and provides the physical controls you'll need for your audio effects. You'll have full control of your audio projects on Day 1, right out of the box!. The open-source schematics and code mean you already have a working reference for designing the controls for your custom project. When ordering this option, female headers will be soldered into your TGA Pro, no soldering is required by you. NOTE: available for Teensy 4.0, 4.1, 3.6 or 3.5.

Includes: - 3 analog pots - 2 pushbutton switches - 2 LEDs - 3.5mm headphone jack

NO MIDI CONNECTORS

If you're planning to install your TGA Pro in a custom enclosure, you'll probably want to use your own chasis-mounted MIDI connectors and solder wires to the board. If you're installing in a small guitar pedal enclosure you may not even need MIDI and want the extra space to fit your mechanical stomp switch. In either case, you still get all the MIDI circuitry onboard, this free option only removes the bulky connectors.

AUDIO DRY OUTPUT JACK

Optionally, a third stereo TRS jack can be installed to provide the preamp output as a clean (dry) signal. This is ideal for situations where you need a copy of the unprocessed original. E.g. to feed a DI, re-amping, etc.

AUDIO JACKS NOT SOLDERED

While the TRS audio jacks are designed with mounting nuts for easy installation in a custom enclosure, you may prefer to use your own. This free option will install the snap-in audio jacks but will not solder them. This allows them to be easily removed so you can solder wires to the board instead. NOTE: snap-in fit may not provide a usable electrical connection.

SOFTWARE

All software is open-source with many effects already available for use and modification. General Teensy software supported is provided by PJRC on their forums. Blackaddr Audio provides it's BALibrary software on Github.

BA Library currently provides the following additional demo effects:

• Analog Delay (simulates vintage BBD delays)
• Sound-On-Sound (holds a chord like a synth pad)
• Tremolo

Teensy micro-controllers support the Arduino libraries and add a powerful Teensy Audio library to provide built-in real-time audio support with the following effects and tools already provided:

• Delay <> Chorus <> Reverb <> Flanger
• Envelope <> Ring Modulator <> Waveshaper
• Filters <> Noise Generator <> FFT Analysis
• Synthesis <> ... and more...

Getting started is easy for beginners: - use the free Arduino software tools with Teensyduino plugin - use the free graphical Audio Design Tool to build a project - use the open-source code audio library as starting point to learn, modify and create!

Additional import taxes and duties may be applied by your country's customs services. These are not included in the amount paid to Tindie.

Teensy, the Audio Library and Audio Design Tool are copyright by PJRC who provides support via the forum.pjrc.com community.