Note Recognizer manual

First of all the Note Recognizer is a tuning app that will suit all your needs. In the settings screen you can adapt the note names that are displayed to your favorite music naming system, as well as the tuning standard and transposition.
With the sensitivity slider you can adapt the sensitivity to the environmental noise and the signal strength of the microphone of your device. If the note name flashes only very shortly or not at all, or the app does not run smoothly, increase the buffer size by moving the slider to the left.

Live Notation
Live Notatation is a sketchbook for your musical idea’s. It will turn acoustic notes into musical notation. Push the live notation button on the front screen. A white screen appears. In the header the note name is displayed that the app hears. At the bottom the record button is waiting for you. When pushed, your recording starts after a one bar pre-count. The four blinking lights represent the four beats of the bar.

Play a melody and watch your score grow. If you play exactly one note on every beat, the result will be notated as quarter notes. If you play two notes in one beat, this will result in eight notes. If you want an upbeat, start playing before the lights reach the front light. The maximum length of a recording is twelve bars.

The recording tempo can be adjusted in the Settings Screen. Dislaimer: A quicker tempo will cost more CPU resources. Running short of CPU power may cause irregularities in the tempo. Frequency recogition is a trade off between accuracy and speed. In quicker tempi notes beneath A2 will not be recognized.

Your recording is transformed into a midi file. After recording you can play back the midi file with the play button.

(Credits to Alex Leffelman for putting to general disposal his Android midi library.)

When you are satisfied with the result, use the camera button to make a screenshot. An image file with the title ‘NoteRec[datetime].JPEG’ will be saved in the /NoteRecognizer directory that you find in the root (“SDcard”) directory of your device. If you own the no ads version of the Note Recognizer, a midi file of your recording will be saved in the same directory. Go to the Settings Screen for purchase. (The free version does NOT save your midi file).

By pushing the ‘C#’ button, you get a list of the played series of notes. Every line shows the note names played in one bar. The gridlines represent the beat on which the note was played. This list also can be saved with the camera button. If you play a transposing instrument, like trumpet or saxophone, select in the settings screen the suitable transposition.

My notes are a mess, how can I improve this?
First analyse your musical idea and determine which notes are on the beat, and which notes are between the beat. Then play like a robot, EXACTLY in time with the beeps and blinking lights. ‘Round’ sounds are better recognized then ‘sharp’ sounds. If you use a keyboard, try to find a sound that gives good results. This version supports treble cleff and octave treble cleff. If you play below A3 and not higher then E5, the notation will be transposed one octave upwards. Singing will only work if you are a really good singer. You need to hit the notes without any wavering or glissando\’s.

I did all this, and still there are flaws in the notation…
This is version 1.3 of this feature. Development is quite a challenge and there is a lot of room for further improvement.

Plans for next version(s) are:
– More time signatures (3/4, 6/8) (no ads version)
– Sixteenth notes (no ads version)
– More recording pages, aiming at 60 bars (12 bars a page)
– Singing algorithm: option for relative interval recognition, which will be moreĀ forgivingĀ for intonation mistakes when singing. (no ads version)



No frequency recognition
If the needle does not move at all, this could mean that the audio record function is still occupied by another app that you used before. Try to remember which app you used recently that uses sound recording and close it via the Android settings screen. Or shut down your device and start it up again, which should free the audio record function.

Irregular running
The cents meter at the front moves irregularly and notes only flash shortly. This could mean your device runs short of CPU power. Remove unneeded apps. Apps perform background tasks that use CPU all the time, so by getting rid of apps your device will run better again. If this does not help, go to the Settings Screen and move the Buffer Size slider to the left.

Unwanted notes in Live Notation
If you get notes that you did not play, this could mean that Live Notation reacts to environmental sounds, such as the noise of keyboard keys. Go to the Settings Screen and move the Sensitivity Slider to the left to more robust.

I can’t find my screenshot
To access the file system of your device, you need a file manager app. Most likely such an app is already installed on your device, called ‘My Files’ (English), or something like that in your own language. Push ‘All files’, and scroll until you find the NoteRecognizer directory. If you do not have this app, which might be the case for Android 4.4 users, download a free app from Google Play. Search for ‘file manager’.

Other problems
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