As for this forum, I only fill happines
I found here many neumes and rare chants, I was looking many years
Also found friends to learn more about byz. style
As for this topic
I believe most members here have nice understanding of scales
So they don't need any virtual instrument
But I am beginner to scales, and it is interesting playng and learning scales on PC
This is another page with virtual instr. enabled to play different scales
http://www.audiomastermind.com/detail-midibag__micro_tuner-9317.html
But I believe easy way is to start with FL studio (DAW)
Load sytrus (channels/add one/sytrus
Than drag and drop over sytrus this pressets (in attach)
And play with your PC Keyboard, or Midi Keyb. if you have one
Diatonic
D, E, F, G, A, B, C, D
D-(10)-E-(8)-F-(12)-G-(12)-A-(10)-B-(8)-C-(12)-D
Soft Chromatic
C, D, E, F, G, A, B, C
C-(8)-D-(14)-E-(8)-F-(12)-G-(8)-A-(14)-B-(8)-C
Hard Chromatic
D, Eb, F#, G, A, Bb, C#, D
D-(6)-Eb-(20)-F#-(4)-G-(12)-A-(6)-Bb-(20)-C#-(4)-D
Every button of Pc Keyb matches one of Midi Keyb.