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!

Cents Frequency Entry Step Mode

Controls: Gen Dlg >> Stream >> Tone Freq >> Step Mode >> Cents
Macros: Fstep, FstepCent

This mode may be selected from the Frequency Entry Step Mode dialog, which opens via the Step mode button that indicates the current mode. That button is located under many frequency entry controls in the Generator. The mode setting applies to most Generator frequency entry controls. The mode only affects values during entry or adjustment; it does not change previously-entered frequencies.

Use Cents mode to produce tones that fall on exact musical note frequencies, whether you use scrolling or keyboard entry. Equal note spacing is assumed here, with the default being the standard "equal tempered" system used in most Western music. This system has 12 "semitone" twelfth-octave steps per octave, each step being 2^(1/12) times the one below it, an increase of about six percent (2^1/12 = 1.05946). The standard reference frequency is 440.000 Hz at the A above middle C on a piano, sometimes known as "concert A".

The equal tempered tuning system defines one "cent" as one percent of one twelfth-octave (semitone) step. The default here is 100.00 cents to get standard notes. Most listeners require a change of at least 2 cents (about 0.1%) in order to detect a difference between two tones under ideal conditions.


Macro Notes:

Fstep=Cent or Fstep=4 sets Cents Step Mode.

FstepCent=200 sets the step size to 200 cents (two semitones).


See also Frequency Entry Step Mode, Octave frequency Entry Step Mode, Ratios and Octaves, Standard Musical Note Frequencies.

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