******
TBD-16
******

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   <img src="../_static/assets/dadamachines-tbd-16_mockup_002.jpg" alt="dadamachines TBD-16" style="max-width: 100%; width: 100%;">

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     <a href="#technical-specifications" class="hw-nav-btn">Tech Specs</a>
     <a href="#connectivity" class="hw-nav-btn">Connectivity</a>
     <a href="#assets" class="hw-nav-btn">Assets</a>
     <a href="#getting-started" class="hw-nav-btn">Getting Started</a>
     <a href="https://dadamachines.com/shop/" class="hw-nav-btn hw-cta">Buy</a>
   </div>


Overview
========

The TBD-16 is a complete desktop instrument built around the open-source CTAG TBD audio
engine. Plug in power and it boots into the default Groovebox / Drum Machine firmware
with 16 tracks. No computer, no Eurorack case, no setup required.

- **30 buttons** --- Transport, track select, mute, pattern controls
- **4 endless potentiometers** (with push-switch) --- 360° rotation for parameter control
- **2.4" OLED display** --- 128 × 64 px, shows track state, menus, and parameter values
- **19 RGB LEDs** --- Visual feedback for track state, sequencing, and modes
- **50+ DSP plugins** --- Synthesizers, effects, drum machines, granular engines, and more
- **Two independent channels** --- Run any two plugins simultaneously
- **Portable** --- Works with any USB power bank; an optional
  `power bank mount <https://www.amazon.de/dp/B0BCK5Y852>`_ clips on the back
- **Open source** --- Write plugins in C++, test in the simulator, flash to hardware


Technical Specifications
========================

.. list-table::
   :widths: 30 70
   :header-rows: 0

   * - **Processors**
     - ESP32-P4 (DSP) · RP2350B (UI/MIDI) · ESP32-C6 (WiFi) --- `see Processors section <#processors>`_
   * - **Audio Codec**
     - `TLV320AIC3254 <https://www.ti.com/product/en-us/TLV320AIC3254/part-details/TLV320AIC3254IRHBR>`_ --- Stereo 24-bit ADC/DAC with embedded miniDSP
   * - **Sample Rate**
     - 44.1 kHz (firmware default; codec supports 8--192 kHz)
   * - **Bit Depth**
     - 32-bit I2S bus · 32-bit float internal processing
   * - **Processing Buffer**
     - 32 stereo frames (0.73 ms per buffer at 44.1 kHz)
   * - **DAC SNR**
     - > 110 dB (A-weighted, measured)
   * - **DAC THD+N**
     - 0.018 % / −75 dB (1 kHz, 0 dBV, measured)
   * - **ADC SNR**
     - 93 dB typical (codec datasheet)
   * - **Channel Separation**
     - −83 dB (measured)
   * - **Audio I/O**
     - Stereo line in · stereo line out · headphone out (all TRS 3.5 mm)
   * - **MIDI**
     - 2× TRS In (Type-A) · 2× TRS Out · USB MIDI · USB Host MIDI
   * - **USB Ports**
     - 3× USB-C · 1× USB-A Host
   * - **Wireless**
     - WiFi (ESP32-C6) · Ableton Link
   * - **Storage**
     - 2× micro SD (P4 + RP2350)
   * - **Display**
     - 2.4" OLED, 128 × 64 px
   * - **Controls**
     - 30 buttons · 4 endless pots (with push-switch) · volume wheel
   * - **LEDs**
     - 19 RGB LEDs
   * - **Power**
     - USB-C (5 V) --- works with any USB power bank or adapter
   * - **Dimensions**
     - *Coming soon*
   * - **Weight**
     - *Coming soon*


Processors
==========

.. list-table::
   :header-rows: 1
   :widths: 18 18 22 42

   * - Chip
     - Role
     - Core
     - Key Specs
   * - `ESP32-P4 <https://www.espressif.com/en/products/socs/esp32-p4>`_
     - DSP Engine
     - Dual RISC-V @ 400 MHz
     - 32 MB stacked PSRAM · 16 MB Flash · AI/vector instructions · USB 2.0 OTG
   * - `RP2350B <https://www.raspberrypi.com/products/rp2350/>`_
     - UI / MIDI
     - Dual Arm Cortex-M33 @ 150 MHz
     - 520 KB SRAM · 48 GPIO · 8× 12-bit ADC · 12× PIO state machines · FPU + DSP · TrustZone + TRNG
   * - **ESP32-C6**
     - WiFi
     - Single RISC-V
     - WiFi 6 (802.11ax) · Bluetooth 5 · managed by the P4

The P4 and RP2350B communicate via SPI. The RP2350B handles all UI input and MIDI
and forwards control data to the P4; the P4 runs audio processing and sends status
and Ableton Link data back.


Connectivity
============

Audio
-----

- Stereo **line input** (TRS 3.5 mm)
- Stereo **line output** (TRS 3.5 mm)
- Stereo **headphone output** (TRS 3.5 mm) with volume wheel


Audio Performance
-----------------

The TBD-16 uses the `TLV320AIC3254 <https://www.ti.com/product/en-us/TLV320AIC3254>`_
stereo audio codec from Texas Instruments. Below is a summary of the hardware
capabilities and the firmware defaults, followed by measured performance data.

**Hardware vs. firmware defaults**

.. list-table::
   :header-rows: 1
   :widths: 30 35 35

   * - Parameter
     - Hardware Capability
     - Firmware Default
   * - Sample rate
     - 8 kHz -- 192 kHz
     - 44.1 kHz
   * - I2S word length
     - 16 / 20 / 24 / 32 bit
     - 32 bit
   * - Internal processing
     - ---
     - 32-bit float
   * - MCLK
     - ---
     - 256 × fs = 11.29 MHz (Audio PLL)
   * - DAC oversampling (DOSR)
     - ---
     - 128
   * - ADC oversampling (AOSR)
     - ---
     - 128
   * - Processing buffer
     - ---
     - 32 stereo frames (0.73 ms)
   * - DMA buffering
     - ---
     - 4 × 32 frames (2.9 ms)
   * - PLL
     - Available
     - Disabled (direct MCLK clocking)
   * - ADC high-pass filter
     - Programmable IIR
     - First-order IIR at ~3.7 Hz (DC blocking)

**Measured performance** (line output, DAC only)

Measured with a MOTU UltraLite AVB reference interface and
`ARTA <https://artalabs.hr/>`_ spectrum analyzer software.
Test signal: 1 kHz sine (SineSrc plugin), output level calibrated to 0 dBV
(1 V\ :sub:`rms` , full scale).

.. list-table::
   :header-rows: 1
   :widths: 40 30 30

   * - Parameter
     - Left Channel
     - Right Channel
   * - THD+N (1 kHz, 0 dBV)
     - 0.018 %
     - 0.023 %
   * - SNR to first harmonic
     - ~80 dB
     - ~78 dB
   * - SNR to noise floor
     - > 110 dB
     - > 110 dB
   * - Noise floor (DAC muted)
     - > 120 dB
     - > 120 dB
   * - Channel separation
     - −83 dB
     - −83 dB

**Codec datasheet ratings** (for reference, TI test conditions)

.. list-table::
   :header-rows: 1
   :widths: 35 25 20 20

   * - Parameter
     - Path
     - Typical
     - Min
   * - DAC SNR (A-weighted)
     - Line out
     - 100 dB
     - 87 dB
   * - DAC Dynamic Range
     - Line out
     - 100 dB
     - ---
   * - DAC THD+N
     - Line out
     - −83 dB
     - −70 dB
   * - DAC SNR (A-weighted)
     - Headphone out
     - 100 dB
     - 87 dB
   * - DAC Mute Attenuation
     - Line out
     - 119 dB
     - ---
   * - ADC SNR (A-weighted)
     - Single-ended
     - 93 dB
     - 80 dB
   * - ADC Dynamic Range
     - Single-ended
     - 92 dB
     - ---
   * - ADC THD+N
     - Single-ended
     - −85 dB
     - −70 dB

Full electrical characteristics are in the
`TLV320AIC3254 datasheet <https://www.ti.com/lit/ds/symlink/tlv320aic3254.pdf>`_.

MIDI
----

All connections follow the `TRS Type-A standard <https://minimidi.world/>`_ ---
no adapters or special cables needed.

.. list-table::
   :header-rows: 1
   :widths: 25 75

   * - Connection
     - Details
   * - **TRS MIDI In 1**
     - TRS 3.5 mm Type-A input for keyboards, sequencers, and controllers
   * - **TRS MIDI In 2 / Clock**
     - Second TRS 3.5 mm Type-A input; doubles as Clock/Reset input for
       Eurorack and modular sync (use a 3.5 mm splitter cable for separate
       Clock and Reset).

       **Note:** Analog Clock/Reset requires toggling the switch on the bottom of the case.
   * - **TRS MIDI Out 1**
     - TRS 3.5 mm Type-A output for sending MIDI to external gear
   * - **TRS MIDI Out 2**
     - Second TRS 3.5 mm Type-A output
   * - **USB MIDI**
     - Class-compliant USB MIDI via USB-C #1 (no drivers required on any OS)
   * - **USB Host MIDI**
     - Connect MIDI controllers directly via USB-A Host Port

MIDI is processed by the **RP2350** front-end processor. External MIDI
messages (TRS or USB) are received by the RP2350 and forwarded to the ESP32-P4,
where plugins can respond to Note On/Off, Control Change, Pitch Bend, Program
Change, and Clock messages. The RP2350 also runs its own generators, sequencers,
and arpeggiators that control plugins via the SPI bus.

.. tip::

   For wireless tempo sync without MIDI cables, use
   :doc:`Ableton Link </get_started/15_wifi_and_link>` instead of MIDI clock.


USB
---

.. list-table::
   :header-rows: 1
   :widths: 25 75

   * - Port
     - Function
   * - **USB-C #1**
     - ESP32-P4 Device (High Speed): USB MIDI, USB Network
       (web interface without WiFi), firmware flashing via JTAG
   * - **USB-C #2**
     - Additional power and/or RP2350 Device
   * - **USB-C #3**
     - ESP32-P4 JTAG (front panel)
   * - **USB-A**
     - USB Host Port for MIDI controllers and other USB peripherals


WiFi
----

Configuration and preset management interface via ESP32-C6.
See :doc:`WiFi & Ableton Link </get_started/15_wifi_and_link>`.


SD Cards
--------

Two slots: P4 (config, samples, web UI) + RP2350 (firmware images, user data).
See :doc:`Storage & Samples </get_started/20_storage>`.


Assets
======

Downloadable assets (datasheet, mechanical drawings) will be published here as
they become available.

..
   Future assets:
   - Datasheet PDF
   - Mechanical drawing / dimensions
   - Quick start guide PDF


Getting Started
===============

Your TBD-16 ships ready to use:

1. :doc:`Using Your TBD-16 </get_started/10_using_your_tbd>` --- Plug in power and start making music
2. :doc:`WiFi & Ableton Link </get_started/15_wifi_and_link>` --- Set up WiFi, web interface, and Link
3. :doc:`Storage & Samples </get_started/20_storage>` --- Manage SD card content
4. :doc:`Flash & Updates </flash/index>` --- Update firmware from your browser

----

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     <a href="https://dadamachines.com/shop/" class="hw-btn-primary">Buy TBD-16</a>
     <a href="https://dadamachines.com" class="hw-btn-secondary">dadamachines.com</a>
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