One Last Time made famous by Ariana Grande
• 11 customizable audio tracks:
(Click, Drum Kit, Percussion, Synth Bass, Synthesizer, Synth Keys, Synth Keys, Guitar Synth, Noise effects, Backing Vocals, Lead Vocal)

One Day More made famous by Les Misérables (musical)
• 15 customizable audio tracks:
(Click, Orchestral Percussion, Bass, Digital Piano, Brass section, String Section, Backing Vocals, Female Lead Vocal, Female Lead Vocal, Female Lead Vocal, Male Lead Vocal, Male Lead Vocal, Male Lead Vocal, Male Lead Vocal, Male Lead Vocal)

Oh No Not You Again made famous by Australian Crawl
• 12 customizable audio tracks:
(Click, Drum Kit, Bass, Acoustic Guitar, Acoustic Guitar, Electric Guitar, Electric Guitar, Electric Guitar, Lead Electric Guitar, Piano, Backing Vocals, Lead Vocal)

Oh Girl made famous by The Chi-Lites
• 12 customizable audio tracks:
(Click, Drum Kit, Bass, Electric Guitar, Electric Guitar, Electric Guitar, Piano, Organ, Harmonica, String Section, Backing Vocals, Lead Vocal)

Obsesión made famous by Miguel Mateos
• 12 customizable audio tracks:
(Click, Drum Kit, Noise effects, Synth Bass, Electric Guitar, Synthesizer, Synth Keys, Synth Flute, Synth Brass, Alto Saxophone, Backing Vocals, Lead Vocal)

O descobridor dos sete mares made famous by Tim Maia
• 14 customizable audio tracks:
(Click, Drum Kit, Percussion, Bass, Electric Guitar, Lead Electric Guitar, Piano, Electric Piano, Synthesizer, Synth Pad, Brass section, String Section, Backing Vocals, Lead Vocal)

Outshined made famous by Soundgarden
• 8 customizable audio tracks:
(Click, Drum Kit, Bass, Distorted Electric Guitar, Electric Guitar, Lead Electric Guitar, Backing Vocals, Lead Vocal)

One Fine Day made famous by The Chiffons
• 9 customizable audio tracks:
(Click, Drum Kit, Upright Bass, Rhythm Acoustic Guitar, Acoustic Guitar, Piano, Tenor Saxophone, Backing Vocals, Lead Vocal)

One Hundred Ways made famous by James Ingram & Quincy Jones
• 11 customizable audio tracks:
(Click, Drum Kit, Bass, Electric Guitar, Electric Piano, Synth Pad, Synth Strings, Synth Lead, Brass section, Tenor Saxophone, Lead Vocal)

One Hundred Ways made famous by Quincy Jones & James Ingram
• 11 customizable audio tracks:
(Click, Drum Kit, Bass, Electric Guitar, Electric Piano, Synth Pad, Synth Strings, Synth Lead, Brass section, Tenor Saxophone, Lead Vocal)