Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!
The following is from the Daqarta Help system:

Features:

Oscilloscope

Spectrum Analyzer

8-Channel
Signal Generator

(Absolutely FREE!)

Spectrogram

Pitch Tracker

Pitch-to-MIDI

DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Period
    Event
    Spectral Event

    Temperature
    Pressure
    MHz Frequencies

Data Logger

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Automotive

Product test

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your application!

MIDI Buffer Add Value Commands


Changes: BAvb.i0=(add,count)

The Buffer Add Value (BA) command allows a MIDI Changes script to modify a section of an input buffer by adding a specified amount to each note. (See Buffer Copy and Buffer Fill for getting notes into the buffer to be modified.)

The format for Buffer Add Value is BAvb.i0=(add,count), where v is Voice number 1-8, and b is buffer number 1-4. i0 is the index (position) where the addition should start, add is a the amount to add (which may be negative), and count is the number of notes to be affected.

i0, add, and count may use any unsigned integer or valid expression, including current MIDI control values, random values, current computer keyboard states or mouse position, input or buffered notes, oscillators, and User Variables. i0 will be limited to the 0-255 buffer range. add will be limited to +127/-128, and count will be limited such that the 256-note buffer size is not exceeded.

The actual notes resulting from the addition will be limited to the standard 0-127 MIDI note range.

Note: The Add Value operation detects if the note to be modified is a silent note from the Pitch Tracker, and if so that note is passed through without addition.

Unlike Buffer Copy and eXchange, Buffer Add Value may not be used with Voice Patterns.

You can use Set Pointers to set start and end note positions in the buffer, and Input Select to use it as the input stream for a Voice.

The normal Buffer Add BA command computes the add value once, and adds it to all buffer positions.

There is also a Ba variant that recomputes add for each position. If add is an expression that includes oscillators or random values, each position may have a different value added to it. This is useful for modifying bass, rhythm, or melody lines.

For example, Ba21.0=($a(-6,+6),8) would add 8 points from the oscillator $a output to Voice 2, buffer 1 starting from the 0th position.

The oscillator in this example is scaled such that a full cycle would swing between -6 and +6. The actual range covered by the 8 points used here would depend upon the frequency of the oscillator... a low frequency might not move very much in only 8 points.

A use-based (lower case) oscillator $a to $h is usually best for inclusion in add, because its output is computed on every use. A frequency-based oscillator $1 to $8 or a beat-based oscillator $A to $H will act as a constant whose value is the current output of the oscillator at the beat when the command is processed.


See also Changes Script Buffer Operations, Changes Script Overview, Changes Script Editor, MIDI Voice Setup Dialogs, Pitch-to-MIDI dialog, Pitch Track Toolbox - Overview

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