Q&A in music
Repetition in full scale
Variation 0642 and 1-note-1-string method
Beginning from the 3rd scale
The cycle of the forged triplet
Pentatonic scales in tetrachord
Q&a for software

The metronome sometimes stops working


Q&A in music


Repetition in full scale

Why can't I set repetition in full scales? (so why can't I set it to repeat it forever?)


The problem is purely practical: Try playing the variation 0123 in the F-major full scale at 110 beats per minute! (2 minutes and 14 seconds). This is a very heavy exercise, even for intermediates.

So, these full scale exercises last long, and the fact that the student has to pay attention on holding the pick right, the finger order, and the rhythm. After 2-3 minutes, this question will have no point.


Variation 0642 and 1-note-1-string method

I have selected the 1-note-1-string method with the variation 0642. The OSIRE did not play it. Why?


This question was asked by one of my intermediate student. He clearly is not aware of the logic of the methodology yet. Well, every programmer writes his/her creation to be 'foolproof'. This means that the software needs to have a suitable, convenient user interface and prevent it to go 'haywire'.
So, what happened here? He had set a variation (0642), which belongs to a heptachord scale system as


  • 0: 1st note

  • 1: 2nd note

  • 2: 3rd note

  • 3: 4th note

  • 4: 5th note

  • 5: 6th note

  • 6: 7th note

...and he used the 1-note-1-string option on a 6-STRINGED guitar. Well, this is a contradiction, and the OSIRE refused to play it, as it is not possible to play 7 notes on a 6 stringed guitar with the method above. Tamas, the programmer foreseen these problems, and prevented these from happening. A good example of software engineering.


Beginning from the 3rd scale

The OSIRE can't play scales, if I set it to play it from the 3rd scale.


On the F-major full scale, playback indeed starts from the 1st scale:



However, if we want to play it straight from the 3rd scale (which is the prhygian), then we have to find the full scale where this scale (phrygian) starts. In this case, it's the F-phrygian (therefore it is the C-sharp-major):



With these settings, the OSIRE will play the scale we want. However, don't include notes that start at the 0th fret (the whole string string picked), as the OSIRE won't play them!
This rule applies to bichord (pentatonic) scales as well:



The OSIRE won't play back this scale starting from the 1st fret.


The cycle of the forged triplet

I have to play the variation '012' five times, and a '0' comes in the end at the forged triplet (0120 1201 2012 0120). Would not be simpler a rearranging the formula to 012 012 012 012 012 0?


Unfortunately not. We must not forget the fact that we are in sixteenths and not triplets, so one metronome tract has four played notes. The triplet arrangement would be three notes. It's a different scale variation.

So we have this:


0120 1201 2012 0120


which is certainly not the same as this:


012 012 012 012 012 0


Just try it out in the software!


Pentatonic scales in tetrachord

The problem is the following:


  • We are in the trichord system

  • Select C-pentatonic, and play it in tetrachord with the OSIRE.

  • Stop playback, and start it again (won't work), or try altering some playback settings (won't work either)

The problem can be solved by switching into harmonic minor, and re-selecting the trichord system. Why is this?

Selecting tetrachord system in pentatonic scales will make the dots disappear (the notes won't be on the fretboard!), but the metronome continues playing. Actually, you just switch the metronome on, as there are no valid parameters for the scale playback plugin. When you notice the error and stop it, you can't resume, as the fretboard is empty. When you select an other scale, you will have the fretboard filled in again, and solves the problem.

We have identified and solved this problem at the Papp's pentatonic scales as well.

However, it is necessary to note the following:
Using the School's scale catalogue, and the fact that the OSIRE can use 12 notes in a variation,

It turns out that the OSIRE supports 212 = 4096 different scale variations. This is the maximum number of scales that can be used in the tempered scale system including the interval that is described below:

  • 1000000000000 (say if we use C as the starting note, and include it)

  • ...

  • ...

  • ...

  • 111111111111 (chromatic scale, which includes half notes)

So this means that there are no more intervals, scales in the tempered sound system.


The OSIRE adds extra 3 notes to this (as it is in the manual under 'Extra notes'), so the actual number of variations is 215 = 32768. In theory, we should check all these variations, but it is not possible. If I say that it needs 10 seconds to check one scale, that would mean that if we are working 24/7, it would take approximately 227.5 days to verify everything (32768 x 10 / 60 / 24 = 227.5).

Instead, we have made special exeptions, which gets rid of most of these scales. However, there is the chance of someone finding an 'impossible' scale, which we will take care of.

Q&A for software



After purchasing the software, I get a registration window, and it doesn't let me using it!


The OSIRE requires a working internet connection to be activated. Without this, the OSIRE can not let the user using it!


The metronome sometimes stops working

I use OSIRE 1v. The problem is that if I use it as a metronome only, the volume of it gradually lowers after the 15th tract, and it becomes inaudible after the 30th. If I pause and resume, it will be fine again. This problem is not present when I play a scale variation.


The program does not set the volume in the instruments played back. If it's possible, update the sound card's drivers, and switch off any special MIDI sequencer features. Have you not got some sort of echo cancellation on? As the variations are constantly changing, the metronome isn't, which could trigger features like this.

www.music-instrument-guitar.com - The OSIRE - FAQ