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README.md

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Harp Soundcard

This is a high performance sound card with two output channels using 24 bits DACs at 192kHz sample rate.

HarpSoundcard

Hardware Compatibility

HW Version Board Board HW Version Notes
All Peripheral.AudioAmp >= 2.0

Firmware Compatibility

FW Version Board Board HW Version Notes
>= 2.2 Device.SoundCard >= 1.0 Bpod serial communication not supported
<= 2.2 Device.SoundCard >= 1.0

Key Features

  • Internal memory to store sounds, enabling low-latency sound delivery
  • Pre-selected sounds can be triggered using an external TTL
  • Internal wave generator allows the user to configure a pure tone without loading a sound file
  • Stereo 24 bit @ 192 kHz maximum sampling rate outputs
  • THD: -111dB (1 kHz @ 2 V rms)
  • Noise Floor: 20 µV rms | -94 dB (20 Hz – 80 kHz)
  • SNR: 100 dB | 113 dbA (20 Hz – 80 kHz @ 2 V rms)

Connectivity

  • 1x clock sync input (CLKIN) [stereo jack]
  • 1x USB (for computer communication) [USB Mini-B]
  • 1x micro USB (for sounds loading) [USB Micro-B]
  • 1x 12V supply [barrel connector jack]
  • 1x reset button [tactile switch]
  • 1x output for the left channel [RCA]
  • 1x output for the right channel [RCA]
  • 3x general purpose digital outputs (3.3V or 5V) (OUT0-OUT2) [screw terminal]
  • 3x general purpose digital inputs (5V tolerant) (IN0-IN2) [screw terminal]
  • 2x analog inputs (3.3V máx - 5V tolerant) (ADC0-ADC1) [screw terminal]

Interface

The interface with the Harp Soundcard can be done through Bonsai or a dedicated GUI (Graphical User Interface).

Install Graphical User Interface (GUI)

In order to use this GUI, there are some software that needs to be installed:

1 - Install the drivers.

2 - Install the runtime.

3 - Reboot the computer.

4 - Install the GUI.

Install Drivers

To install the proper drivers to interface with the device, follow the next steps in sequence.

1 - Connect both Harp Sound Card's USB ports to the computer.

2 - Launch the previously installed Harp Sound Card GUI.

3 - Click on the button Open Drivers folder and launch the zadig-2.3.exe.

4 - (1) Select the Harp Sound Card from the list. If the device is not available, go to Options -> List All Devices.

5 - (2) Select the WinUSB driver and click Install WCID Driver.

Zadig

Firmware

Tagging Scheme

Tag Description
SoundCard-* Firmware for the sound card's microcontroller (8 bits processor)
SoundCard.PIC32-* Firmware for the sound card's 32 bits processor

Firmware Update

1 - Install the Harp Converto to CSV.

2 - Open the Harp Convert to CSV application and write bootloader under List box on the Options tab

3 - Select the correspondent COM port and then select the firmware to be loaded for both microcontrollers

Licensing

Each subdirectory will contain a license or, possibly, a set of licenses if it involves both hardware and software.