He has placed his first five Applications (Apps)
on the iTunes store. All run on the iPad and
all but the fourth run on the iPhone/iPod Touch/iPad.
The sixth (iSingad) is for learning
to sing where you can see the output from your voice
as a waveform, spectrum or spectrogram. Other displays
will be added soon including pitch, vocal tract shape
The fifth (Theremini) turns your device
into a miniature Theremin.
The original Theremin was a musical instrument which
enabled the pitch and volume of a sine wave to be varied
as the player's hands were moved close to and away from
two antennas. Theramini makes use of the accelerometers
for pitch and volume and adds other waveforms, vibrato
and a speed of response control. Theramini can be used
as a musical instrument, for exploring human hearing
ability and as a test oscillator.
The fourth (HarmSyn and the "try
it and see" version HarmSyn Lite)
allow sounds to be created whose components (harmonics
1-16) can be varied at will as well as the fundamental
frequency (f0), volume, vibrato and tremolo. A number
of preset sounds can be used via a set of buttons. Compared
with the Lite version, the
full version has a greater f0 range of 20 Hz to 20 kHz
rather than 20 Hz to 1 kHz, a logarithmic or linear
f0 controller rather than just linear, 16 rather than
8 harmonic sliders and a greater choice of preset sounds.
The third (Wedding Service Music)
is to allow selection of music that can be used at a
church wedding during the five key musical moments during
the service: Beforehand, at th eentry of the Bride,
During the service, at the signing of the Register and
for the Exit Processional. There are over 70 pieces
of music represented and in each case, a short section
of the music can be heard to facilitate making a choice.
In addition, each piece of music has a description and
the words are listed where appropriate. The App provides
a way of helping this special day along with your choice
of music for the occasion.
The second (8ve Oscillator and the
"try it and see" version 8ve Oscillator
Lite) is an octave oscillator with various
waveforms (sine, square, pulse, sawtooth, triangular)
available at fundamental frequencies spaced at the octaves
usually used for acoustic and audiological (hearing)
testing (125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz,
8 kHz) as well as white noise. In addition and for interest
it will also include 16 kHz which is generally only
heard by those under about 25 years of age (the so-called
"teen scarer" or "mosquito" sound).
Fundamental frequency can also be set to an arbitrary
value in the range of human hearing (20 Hz to 20 kHz).
Output level can be adjusted in steps of 1, 3, 6, or
10 decibels (dB).
The first (Organ Stops) lists the
footages of all manual and pedal pipe organ stops that
can be found on all existing instruments along with
a large selection of stop names - somewhat anorakish
I know - but prepared as a way of finding out what is
involved in creating an App. Bottom C for each stop
footage can be played, including that for a 128' pedal
rank (I know there is no 128' rank in existence but
this is available when a 64' and a 42 2/3' are drawn
together; a so-called "virtual pitch").