Pulse Synthesizers Load Runner Operating Manual

Granular synthesizer

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Pulse Synthesizers
Load Runner Granular
Synthesizer
Operating Manual
Page 1 of 13
V1.0

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Summary of Contents for Pulse Synthesizers Load Runner

  • Page 1 Pulse Synthesizers Load Runner Granular Synthesizer Operating Manual Page 1 of 13 V1.0...
  • Page 2: Table Of Contents

    Table of Contents Introduction ............................3 Power Connections ..........................3 Front Panel ............................4 1.3.1 Granular Controls..........................4 1.3.2 Play Controls ............................. 4 1.3.3 Navigation Controls .......................... 4 1.3.4 CV Inputs ............................5 1.3.5 Output ............................... 5 Importing Sounds ..........................6 Playing Sounds ............................
  • Page 3: Introduction

    Introduction The Load Runner module uses a form of granular synthesis to generate sounds from user audio sources. The term ‘granular’ refers to small snippets of sound ranging from 10 milliseconds to 1 second; each short section of sound is referred to as a grain. An amplitude envelope is applied to each grain in order to smooth out any transients and to create different sonic textures.
  • Page 4: Front Panel

    Front Panel 1.3.1 Granular Controls There are five front panel knobs which allow control over the granular generation. Density Density controls the number of grains playing simultaneously. Up to 15 grains can be played at a maximum down to around 1 grain every 10 seconds depending on the grain length. Start / Range Time Each grain is generated or started from a randomly selected point in the audio sample between the start and range positions.
  • Page 5: Cv Inputs

    1.3.4 CV Inputs Sample CV Allows control voltages to select files in the internal memory for granular playback. A +5V pulse at the input will increment the current playback sample whereas -5V will decrement the current sample. Density CV The density CV input value will be added to the current front panel density knob value. A +5V signal will allow the density value to swing the full range in the positive direction whereas a-5V allows the density value to swing fully negative.
  • Page 6: Importing Sounds

    Importing Sounds Audio samples must be loaded into the modules internal memory before they can be played. From the USB explorer screen all valid 16-bit WAV files will be listed regardless of sample rate. Both mono and stereo files will be shown in the list however by default on the left channel is loaded. Via the settings menu it is possible to select the right channel.
  • Page 7 Internal Memory A maximum of 90 seconds of mono 44.1kHz audio can be loaded into the internal memory. The percentage of memory currently used is displayed in the top right-hand corner of the screen. Prior to loading the sample size is compared against the available memory.
  • Page 8 No USB If there is no USB flash drive inserted the screen will display “Insert USB”. Only FAT32 file system formatted flash drives can be read. Page 8 of 13 V1.0...
  • Page 9: Playing Sounds

    Playing Sounds From the waveform screen a visual representation of the selected sample is shown with several granular parameters linked to the front panel controls. Sample Selection When each sample is loaded into the internal memory it is assigned a sample number that is displayed to the left of the file name at the top of the screen.
  • Page 10 Grain Density The grain density controls the number of simultaneously playing grains ranging from 0.01 to 15. With values less than 1 there will be no overlap between grains with audible gaps between them. By increasing the density greater than 1 the grains will begin to overlap forming a continuous sound. Grain Envelope An amplitude envelope is applied to all grains and is shown graphically on the right-hand side of the screen.
  • Page 11: Recording

    Recording The audio output can be internally recorded onto the USB flash drive. The audio is mono, 16-bit 44.1kHz. Recordings are stored on the root directory of the flash drive and are automatically named. A maximum of 100 recording files can be created. Filenames: “REC_001.wav”, “REC_002.wav”...
  • Page 12: Firmware Update

    Firmware Update The Load Runner can install new firmware via the USB interface from flash drive. It is recommended to use a flash drive with only the firmware file on it to reduce the chance of error. There must however be only 1 firmware file on the flash drive otherwise the incorrect file may be loaded.
  • Page 13: Specifications

    Specifications Audio output amplitude +/-5V Sample rate 44.1kHz Internal Memory: 90 seconds, 44.1kHz, mono audio Wav files, 16 bit mono or stereo (only 1 channel loaded) All CV's bipolar +/-5V Panel width 25HP Module Depth 45mm Power consumption 240mA@+12V, 20mA@-12V Page 13 of 13 V1.0...

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