Test 2 pad, legato, monotimbral
This test was set up to again see the scaler MIDI performance, but also to check audio detection when the clip contained two identical 1 bar adjacent legato chords. Obviously, the attack part of the envelope would mean that this was different from the same chord sustained over two bars.
The sequence was three triads and one 4 note chord, being C E G/ C E G / C E Bb / C E G A. Naively, these are Cmaj / Cmaj / C7 (no5) / C6. (See ‘fb test mid.jpg’)
[Again the files are at . | BTinternot ; download ‘detection-fb’ ]
Scaler interpreted that as shown in ‘fb scaler.jpg’. Again, technically Bbsus2 (b5)/C and Cmaj add13 makes sense though they might not necessarily make the right base for add a performance on that.
BIAB, in the other hand, detected C / C / C7 / C6 from the MIDI.
Rendering the MIDI as an audio file (‘fb test.wav’) detected 1 bar of Cmaj/G. (‘fb scaler wav.jpg’) - obviouslyu incorrect. This has been noticed before this test, but the behaviour is now confirmed with monotimbral legato pads.
deCoda analysed the audio as at ‘fb decoda.jpg’, being 3 bars of C and 1 of Am. It seems to only analyse sounds as triads, but this needs checking.
As a quick summary (to be added to later)
1 Scaler is very good at analytically analysing MIDI
2 It may be that the derived chords are not necessarily the best guide to melodic phrases to to fit the intended tonality.
3 BIAB is less accurate and normally matches 4 notes when 4 of more are present.
4 However, BIAB scored better in later tests, when chords were mixed with melodic content - see Part III