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

Contact us about
your application!

Voice Velocity Pattern

Controls: Sgram/PT Dialog >> Pitch-to-MIDI >> Setup
Changes: Vv.i0="string"
Table: Velocity Pattern Characters

See Voice Pattern Overview.

When a MIDI note is played by any voice, its loudness is affected by the overall Voice Level (volume) setting for that voice, and also by a velocity value for the individual note.

MIDI velocity refers to the speed or force with which a note is hit on a piano keyboard. On a real piano the tone color as well as the loudness is affected. On a MIDI synthesizer, a particular instrument may or may not change tone color with velocity, but the effective volume always changes.

A Velocity Pattern specifies the velocities of individual notes. Although MIDI velocity ranges from 0 (off) to a maximum of 127, a Velocity Pattern uses only a single character for each velocity. Fixed velocity characters are '0' (off) to '8' (MIDI 127), with 16 MIDI steps between each of the characters (except the last).

In addition to the normal 0-8 fixed velocity characters, you can use letters to indicate that the velocity should be a random value within a specified range. The allows for a more "human" performance. (See the Velocity Pattern Character Table for a complete list.)

For example 'b' specifies that the velocity should be between '6' and '7'. Since '6' normally encodes a true MIDI velocity of 96 and '7' encodes 112, there is a 16-step range of MIDI values covered by 'b'. The actual value used will be randomly chosen from this range each time the note is played.

A Velocity Pattern is generally not used when tracking a live input. If you leave it blank (along with Note and Chord Patterns), it is the same as '8': All notes are played at maximum velocity. You can then use the Velocity Track option to track the actual input level.

Instead, Velocity Patterns are more typically used with voices that are providing background rhythm or melody lines, for DaqMusiq or KaleidoSynth performances.

When you use Velocity Track with Velocity Pattern characters, the final MIDI velocity is scaled proportional to the current Pitch Track amplitude, relative to full scale for the current Spectrogram/Pitch Track range. (See Adjusting for optimum Velocity Track range in the Velocity Track topic.)

You can enter a pattern of up to 256 notes. This control uses a fixed-width font so that each character lines up with the proper position indicator above it, as well as any corresponding Note Pattern or Chord Pattern entries below. You can use normal mouse or keyboard scroll operations during entry, or the Pattern Scroll controls for later review.

You can use '_', '=', or '-' to indicate that the prior note should be sustained. You can string together as many of these as needed, such as to sustain a chord for multiple beats.

You can use '.' (period) instead of '0' to indicate silence. This makes it more obvious in the pattern. A blank space will also work, but should be avoided due to possible problems with the Windows copy (CTRL+C) and paste (CTRL+V) operations should you later use these.


MIDI Changes Script:

Vv.i0="string" sets "string" characters to the Velocity Pattern for Voice v starting at position index i0, which which may be any unsigned integer or valid expression, including current MIDI control values, random values, current computer keyboard states or mouse position, input or buffered notes, or oscillators. The period before the index must be present. The index value will be limited to 0-255.

If the start index points to a position past the end of the current pattern, the intervening positions will be padded with silence.

The entered "string" must include the surrounding quotes, and may have an arbitrary number of characters. Any characters that would extend past the 255 position will be truncated.

Note that you can use pv=n to set the overall pattern position pointer at any time. See the discussion under Voice Pattern Overview.

Note that you may also use the Buffer Copy or Xchange commands to copy or swap selected portions of the same or two different Velocity Patterns, including reversing their sequence.

If you use Vv on the right side of an expression, it returns the length of the Velocity Pattern for voice v.

Note that you can not use "voice" 9 to set all voice patterns or pointers at once.


See also Voice Pattern Overview, Velocity Pattern Character Table, MIDI Voice Setup Dialogs, Pitch-to-MIDI dialog, Pitch Track Toolbox - Overview

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