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Ozzy Osbourne - I Don't Know - Guitar Lesson

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Key E minor
Ozzy Osbourne - I Don't Know guitar lesson video
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Classic Rock

Gain6
Bass6
Mid7
Treble6
Presence5
Master7
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Ozzy Osbourne Heavy Metal E minor
Capo Advisor 0 E minor · Original key

About I Don't Know

Randy Rhoads wrote the guitar parts for "I Don't Know," and his fingerprints are all over it: chunky power-chord riffing in E minor sits alongside nimble single-note runs that demand both rhythm precision and lead fluidity from the same player. The main riff is deceptively straightforward to learn at a surface level, but locking it in with the right attack and palm-mute weight takes real attention. Rhoads blended classical phrasing ideas into a Heavy Metal framework, so the lead passages reward slow, careful study of each phrase rather than rushing through them. If the transitions between the rhythm sections and the lead fills are tripping you up, use the Practice Toolbar to loop those bars slowed down until the position shifts feel automatic. Ozzy Osbourne released this track as one of Rhoads's earliest recorded statements, making it a genuinely useful piece for understanding how classical technique translates into hard rock guitar work.

  • The main riff is built on E minor power chords with palm muting, so getting the mute pressure consistent is the core rhythm challenge.
  • Randy Rhoads incorporated classically influenced phrasing into the lead sections, so practice each phrase in isolation before connecting them.
  • The song is a strong study in balancing tight rhythm playing and melodic lead work within the same performance.

How to Play I Don't Know

Tuning: Eb Standard · Key: E minor

It is played in Eb standard, a half step down, so tune down before you start or every position and bend will sit a half step sharp against the recording.

Use the section loop to isolate a passage and drop the speed to build each section up to tempo.

Gibson Les Paul Standard
Guitar

Gibson Les Paul Standard

Slash's Les Paul Standard on 'Ordinary Man' delivers Ozzy's signature thick, warm sustain through its mahogany body and set neck. The guitar's natural resonance cuts through a cranked Marshall while maintaining the heavy, blues-rooted tone that defines modern Ozzy records.

Gibson Les Paul Custom
Guitar

Gibson Les Paul Custom

Randy Rhoads and Zakk Wylde both relied on the Les Paul Custom's thick mahogany construction and PAF-style humbuckers for sustained, focused leads that pierce through Marshall saturation. The Custom's weight and warmth became sonic anchors for Ozzy's most iconic guitar tones across decades.

Marshall JCM800
Amp

Marshall JCM800

Zakk Wylde dimed the JCM800 2203 for maximum crunch and tight low-end response, making it the backbone of modern Ozzy heaviness. The amp's aggressive gain structure and natural breakup at volume deliver the roaring, sustained tone perfect for pinch harmonics and heavy riffing.

Marshall Plexi (1959 Super Lead)
Amp

Marshall Plexi (1959 Super Lead)

Randy Rhoads' modified 1959 Super Lead Plexi delivered natural tube saturation with a tight, focused midrange that allowed his fast runs and solos to cut through with clarity. The Plexi's simple, responsive design meant tone came directly from his fingers and Les Paul into the amp.

EMG 81
Pickup

EMG 81

Zakk Wylde's bridge position EMG 81 provides high output and compressed sustain essential for heavy riffing and pinch harmonics that define modern Ozzy songs. The active humbucker's tight low-end response couples perfectly with a dimed Marshall JCM800 for maximum aggression.

Dunlop Cry Baby Wah
Pedal

Dunlop Cry Baby Wah

Randy Rhoads and Zakk Wylde both used the Cry Baby wah to add expressive texture to leads without cluttering their core Marshall-driven tone. The wah's responsive sweep enhanced their solos while remaining secondary to the raw tube amp saturation that defines Ozzy's sound.

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