For the Love of God
Steve Vai — Passion and Warfare (1990)
Tuning: Seven-string standard: B–E–A–D–G–B–E
Guitar: Seven-string guitar, ideally an Ibanez Universe-style instrument. Start with the bridge humbucker for the lead; pickup choice is a practical recommendation, not a verified track-specific setting.
Playing: Use controlled legato, wide vibrato, expressive bends and long held notes. Shape the phrases with picking dynamics and guitar volume; let the delay and reverb support the sustain rather than obscure the note.
Signal Chain
Build left to rightChief DS1
Optional front-end sustain and attack. Its presence in album-era equipment lists does not confirm that this pedal was used on this track.
Brit 900 Lead
A Marshall JCM900-based lead amp model used here as an era-informed approximation; the original track's exact amplifier is unconfirmed.
412 Brit 60B GB 90s
A practical British 4x12 cabinet approximation. The cabinet and microphone used for the original track are not confirmed.
Micro Processor (ST)
Optional, subtle stereo widening inspired by the spacious studio character. This is a Micropitch-style approximation, not a recreation of a documented H3000 setting.
Digital Delay
Adds a restrained trailing repeat to held notes. The suggested time and mix are starting points, not original recording settings.
Hall
Adds a smooth, spacious tail after the amp and cabinet. This is a practical reverb choice, not a claim about the original studio unit or routing.
Follow the chain from left to right. Optional blocks can be bypassed.
Aim for a smooth, singing lead tone with enough gain to sustain long notes, but with clear pick attack and expressive dynamics. The core sound should stay articulate through legato runs and wide vibrato. A small amount of stereo width, delay and hall reverb can suggest the expansive studio presentation without washing out the phrasing. These are proposed Quad Cortex settings, not verified settings from the recording.
Build the sound around the Brit 900 Lead and 412 Brit 60B GB 90s first. Use the bridge humbucker, set the amp for smooth sustain and make sure individual notes remain clear. Add Digital Delay and Hall gently. Add Micro Processor (ST) only if you want more stereo width, and try the optional Chief DS1 only if the amp alone does not sustain enough.
Vai's official guitar inventory identifies the Ibanez Universe UV7PWH as the guitar used to record this song, and Vai has described recording the solo on a Universe seven-string. The original studio amplifier, cabinet, microphone, exact effect chain and settings are not established by the sources used here. Modified Marshalls and a Series 900 head are period clues, not confirmed track-specific equipment. Brit 900 Lead is therefore a reasoned amp approximation; Cravin X100 is an alternative worth trying if you want to explore the album-era Carvin X100B listing. Eventide H3000 and Lexicon 480L are associated with the album-era equipment, but Micro Processor (ST), Digital Delay and Hall are practical Quad Cortex substitutes rather than exact recreations of their hardware or the song's studio routing.
Use seven-string standard tuning B–E–A–D–G–B–E as the starting point. This is consistent with published seven-string transcriptions, but I found no track-specific source establishing an alternate tuning. Choose the bridge humbucker first for a focused lead sound; adjust pickup choice to your own instrument and the clarity of the high notes. Set guitar volume fully up while balancing the preset, then use your playing dynamics and guitar volume for expressive control. The suggested pickup and all numerical values below are practical starting points.
Build it in 6 steps
These settings are starting points for the Quad Cortex, not recovered studio settings. Guitar output, monitoring level, pickups and playing touch will affect the result. Keep the amp and effects serial as listed; no parallel routing is required for this recipe.
Prepare the guitar
Tune a seven-string to B–E–A–D–G–B–E. Start on the bridge humbucker with the guitar volume fully up. Check that bends and vibrato stay in tune, then use picking dynamics and the guitar volume to shape the sustain.
Set the lead amplifier
Select Brit 900 Lead. As an initial range on a 0–10 scale, try Gain 5.0, Bass 4.5, Mid 5.5, Treble 5.0 and Presence 4.5. Aim for a rounded, sustaining lead sound with enough midrange to keep notes present. Raise gain only until held notes sustain comfortably; do not treat these values as historical settings.
Choose the cabinet
Select 412 Brit 60B GB 90s. Start with a dynamic microphone slightly off the speaker centre. If the cabinet block exposes filters, try a low cut near 75 Hz and a high cut near 7.5 kHz. These are practical mix-oriented starting points; the original cabinet and microphone are unknown.
Add optional front-end sustain
Leave Chief DS1 bypassed at first. If the amp needs more sustain or pick definition, engage it with low Distortion around 2.5/10, Tone around 5/10 and Level near unity. Adjust by ear and avoid adding so much drive that the expressive note attack becomes harsh.
Shape the stereo width
Engage Micro Processor (ST) subtly. Start with a low mix, around 5–10%, and keep the effect restrained enough that the dry lead remains centred and clear. Bypass it if you are playing in mono or if the pitch movement distracts from the notes.
Set delay and reverb
Set Digital Delay to roughly 450 ms, with feedback around 15–20% and mix around 12–18%. Set Hall decay around 3–5 seconds and mix around 10–15%. These are suggested starting points. Reduce both mixes if fast phrases become cloudy; raise them slightly for a more spacious sustained passage.
Set up your scenes
Expressive Lead
Main lead scene. Brit 900 Lead and the cabinet are active; leave Chief DS1 bypassed unless the guitar and amp need extra sustain. Use restrained Micro Processor (ST), Digital Delay and Hall settings so the lead stays clear.
Wide Sustains
Keep the same amp and cabinet settings. Engage Micro Processor (ST) and use the suggested delay and Hall levels for long held notes. This scene changes ambience and width, not the historical signal chain; it is a proposed performance option.
Climax
Keep the same core tone and engage Chief DS1 for a modest sustain boost if needed. Preserve the delay and reverb balance from the lead scene; adjust output with a small scene level increase only if the change remains even through your monitoring system.
The lead sounds harsh or fizzy.
Lower Presence or Treble slightly, move the virtual microphone farther off centre, or lower the cabinet high cut. Reduce Chief DS1 drive if it is engaged.
Held notes do not sustain.
Check that the guitar volume is fully up, raise amp Gain a little, and try engaging Chief DS1 with its level near unity. Keep the added gain controlled so the attack remains clear.
The delay blurs fast phrases.
Lower Digital Delay mix and feedback, or shorten the delay time. Keep the dry signal dominant and reserve more ambience for sustained notes.
The tone is too wet or distant.
Lower Hall mix and decay first, then reduce Micro Processor (ST) mix. The lead should remain direct and intelligible before the ambience is added.
The sound is muddy in a band mix.
Reduce Bass, lower the reverb and delay mixes, and check the cabinet low cut. Add a little Mid only if the notes still need to sit forward.