Wah & Volume Pedal Setup with Spark Control X – Help Center

This guide covers everything about using wah and volume effects with the Spark Control X, including expression pedal setup, assignment options, and troubleshooting.

Expression Pedal Setup
Assignment Options
Troubleshooting: Why Doesn't My Pedal Work?
FAQ

Expression Pedal Setup

The Spark Control X has two 1/4" TRS expression pedal jacks for expanded control over your tone. Connect a compatible expression pedal using a TRS (Tip-Ring-Sleeve) cable.

Expression pedal is not included with Spark Control X. You must purchase one separately.

Step 1: Connect the expression pedal

Plug your TRS expression pedal into one of the two expression pedal jacks on the Spark Control X.

Step 2: Open the Footswitch Menu

Once your Spark amp and Spark Control X are connected within the Spark app, go to the Tone Page and tap the icon on the left side of the ToneCloud icon to access the Footswitch Menu.

Step 3: Assign the expression pedal

Tap Exp Pedal and assign a command to the slot.

You can assign Wah Pedal LFO or Volume Control:

To use the expression pedal as a wah: double-tap the COMP/WAH effect unit, scroll down, and select the J.H. Legendary Wah. The wah will switch from auto-detect to manual control mode when it detects the expression pedal.

Wah setup screenshot

Assignment Options

The expression pedal can be assigned to the following functions:

Function	Compatible Spark Models
Wah LFO	All Spark models
Guitar Volume	All Spark models
Music Volume	Spark 2, Spark EDGE, Spark LIVE

When assigned to Guitar Volume, the expression pedal controls the GUITAR knob on the Spark amp. There is no threshold setting — the volume reaches maximum when fully pressed. Use the MASTER knob to adjust the maximum volume.

Connecting an expression pedal to Spark Control X increases battery drain — both in standby mode and when powered on.

Troubleshooting: Why Doesn't My Pedal Work?

Wah or Volume Pedal Not Working?

If you plugged in a wah pedal or volume pedal (not an expression pedal) and it doesn't respond, this is expected behavior. Here's why:

Wah pedals are audio effect pedals that process your guitar signal directly. They must be in the signal chain.
Volume pedals are analog signal controllers that adjust loudness by controlling the audio passing through them.
Spark Control X does not route audio — it sends Bluetooth control commands to the Spark app. Since wah and volume pedals require a physical audio path, they cannot function through Spark Control X.

What You Need Instead: An Expression Pedal

An expression pedal does not process audio — it sends a control signal (via TRS) to adjust digital parameters in the Spark app. This is the only type of pedal that works with Spark Control X.

What to Look for When Buying

A TRS (Tip-Ring-Sleeve) expression pedal
Uses control voltage (CV) for parameter control
No built-in audio processing — it must be a true expression pedal, not a wah or volume pedal

Compatible expression pedals include: Mission Engineering EP-1, Moog EP-3, Roland EV-5, Boss FV-500, M-Audio EX-P. Check with your music shop to confirm compatibility before purchasing.

FAQ

Q: Can I use a real wah or volume pedal with Spark Control X?

A: No. Wah and volume pedals process audio and need to be in the signal chain. Spark Control X does not route audio. Use an expression pedal instead to control digital wah or volume effects in the Spark app.

Q: What is the default function of the expression pedal?

A: By default, the expression pedal controls Guitar Volume. You can change this in the Spark app's Footswitch Menu.

Q: Can I connect two expression pedals at the same time?

A: Yes, Spark Control X has two 1/4" expression pedal jacks. You can assign different functions to each pedal.

Q: Does connecting an expression pedal affect battery life?

A: Yes, battery drain increases when an expression pedal is connected, both in standby and when powered on.

Q: How do I use the expression pedal as a wah?

A: Assign the expression pedal to Wah LFO in the Footswitch Menu, then double-tap the COMP/WAH effect unit in your preset and select the J.H. Legendary Wah (available in the Experience Jimi Hendrix for Spark expansion pack).