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This App is for practice of the musical whistling, especially, designed for long-tone and/or crescendo - decrescendo practice.It displays duration time and pitches by graph format.Only the range of whistling (A4 - F8) is available.It is adjusted for whistling but you may use another instrument if it matches the range of the instrument.[Outline]- Note pitches is displayed in upper area and volume displayed on bottom area.- The pitch of the first note will become the standard pitch. High pitch note is displayed in upper part and lower pitch note is displayed on bottom part.- High volume note is displayed in upper part and low volume note is displayed on bottom part.- Duration time is displayed in the center and it is reset after no sound input over 1 second.- Vertical line appear every 7 seconds.- The switch of "MIC GAIN LOW" on the left side is setting of mic input level. If you are in noisy place, you can turn it ON.[Practice method long-tone (e.g.)]- Breath deeply and whistle on middle volume as long as you can. Usually, whistled without vibrato for this practice.- First, choose a pitch which is easy to whistle, and then you should try high and low pitches.- Target to keep 7 seconds, after aiming try 14 seconds and 21 seconds gradually.- Don't whistle straight to iOS device microphone. It is better to whistle a bit off direction.- You should try to keep the same pitch and the same volume as much as you can. Keep the graph shape straight vertical.- You should avoid to whistle hoarse, breaking and vibration.[Practice method crescendo / decrescendo (e.g.)]- Breath deeply and start to whistle pianissimo and then crescendo until forte smoothly.- And then decrescendo smoothly.- You should whistle the volume range wider and keeping on same pitch as much as you can.- You should whistle the pitch graph (upper part) straight vertical line.- You should whistle to become the volume graph (bottom part) up and down smoothly.- Next, You can try to whistle crescendo - decrescendo repeatedly for several times in one breath.