- PITCH CHANGE - One octave up, one down. The H910 preserves all
harmonic ratios and thus all musical values since it incorporates advanced
circuitry which actually transposes input signals. Any musical interval
can be achieved by the continuously variable pitch change control. The
pitch ratio selected is shown on the 3-digit LED readout. An optional keyboard
allows for pitch change to be produced in discrete musical steps.
- DELAY AND REVERB - The economical H910 is a versatile digital
delay line. It can be used for "doubling" vocals, delay equalization
in sound reinforcement, and for many special effects, including several
types of reverb and echo. Two outputs are available, each with a variable
delay, which allow for vocal multiplying, distributing speaker systems
(especially useful for PA work), and even more effects.
- ANTI-FEEDBACK - Feedback caused by energy buildup due to room
resonance is decreased by shifting successive repetitions of the same signal
away from the resonant frequency. The H910 incorporates a control which
periodically shifts the signal pitch up and down to accomplish this. Unlike
heterodyne "frequency shifters," no dissonances are introduced.
- SPECIAL EFFECTS - Simultaneous use of feedback, delay, and pitch
change can be used to create a variety of audio effects. Maximum delay
and one interval of pitch change combined with feedback generates a musical
progression of a single note. Pitch change and feedback with no delay gives
an unusual robot or alien speech effect. Short delay with feedback but
no pitch change gives a hollow flanging or tunneling effect; long delay
generates a distinctive reverb.
H910 SPECIFICATIONS
INPUT CHARACTERISTICS - Impedance nominal 10k, balanced, maximum
level +24dBm. Level for full dynamic range from -10dBm to +24dBm.
OUTPUT CHARACTERISTICS - Impedance nominal 150 ohms. Suitable
for driving 600 ohms or greater at +18dBm. With XFMR, 600 balanced +22dBm.
DISTORTION - Less than .2% at 1kHz, reference output level. DYNAMIC
RANGE - Greater than 90dB from clipping to noise floor. PITCH VARIATION
- One octave up, one octave down, continuously variable. Digital readout
indicates precise ratio. DELAY - In pitch change mode: 0, 30, 60
milliseconds. In delay only mode: 0 to 112.5ms steps. Delay only output:
0 to 82.5ms in 7.5ms steps. FREQUENCY RESPONSE - At any delay, unity
pitch ratio: 20Hz to 12kHz, +/- 1dB. No degradation with increasing delay.
SIZE - Requires 8.89 centimtres (3 1/2") x 48.26cm (19")
panel space. Extends 22.86cm (9") behind panel. POWER REQUIREMENTS
- 115VAC, 50/60Hz +5% or 230VAC 50/60Hz. Nominal power dissipation 25 watts.
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