This tune is from the Core Skills section on Vibrato.

Vibrato virtually becomes an art form in metal riffs and solos. Short vibrato can sound good when applied amongst quick riffs. But also, the extra sustain you get from distortion on your amp means the vibrato note can be made last for a long time. This ActionTab demonstrates both short and longer uses of vibrato.

Play through the Normal Speed version a few times and notice how vibrato gives a little extra 'something' to the riff and solo. It makes them a lot more expressive and interesting than just playing through the notes normally!

Vibrato can be quite subtle, like in the repeating riff at the start of the ActionTab here - but you'd miss it if it was gone. The longer vibrato used in the short solo at the end also adds a lot to the bends, and puts in much more feel and expression than just playing standard notes instead.

As a general bit of advice - don't go too overboard when applying vibrato in solos. It's good to use, but like anything else, if you overdo it then other good stuff in your solo can become less meaningful. Of course there's no rules, but sometimes in music "less is more"!

The riff and solo are both made up entirely of the A7 scale. This is the exact same as an A major scale except the 7th note is different - it is 1 semitone lower:

A major scale: A - B - C# - D - E - F# - G# - A

A7 scale: A - B - C# - D - E - F# - G - A

This means that the only difference between the 2 scales G and G#!

To play the riff part you will need to alternate between palm muting and open note strikes. No chords are played. Notice that the riff is played using only downstrokes too. This will help you keep the rhythm tight and consistent whilst playing at this moderate speed.

Remember the golden rule - get it right at a slower comfortable speed first, then work on building speed! After that, it's all between you and the mirror.