Tip: Experiment With the Studio Tube Pre

What was a great discovery for me, and may be of interest to other Helix Users, is that Helix has a Studio Tube PreAmp located in the PreAmp > Mic Models List! This Studio TubePre may be placed in Helix’s Signal Path(s) as a Block, once, or several times, and can be just as useful for guitar as it can be for Mics!

Try it positioned early in the Signal Path.

— MusicLaw

Tip: About the Leslie 145

The rotary speaker models are HX updates to rotary speaker pedals. So, they were originally designed to go before an amp. However, once they got in Helix, we realized that they are much more versatile. Let me explain what is going on in the effect.

The dry path is true stereo. The effected path is summed to mono.
The effected path goes through a simulated power amp. It’s nowhere near as accurate as the HX amp modeling. It was just to add some extra grit that one might find in a rotary speaker cab.
Then the signal splits and it gets the separate woofer and horn modeling. This includes filtering an EQ to model the speakers in the cabinet.

Now, how should it be used?

I would use it in one of two way: as a pre amplifier effect pedal, or as a post amplifier cab replacement.

If it’s being used before an amp mode, then there should definitely be a cab or IR model after the amp. The drive knob should be tweaked to the desired amount. I think the drive knob has enough range to distort with just a guitar level signal plugged in.

If it’s being used after an amp model, then the switch that turns on the rotary effect should also turn off the cab or IR block that is being used when the rotary effect is bypassed. Special care should be paid to the Dive knob in the rotary effect. Since it was originally designed to be an effect before an amp, the level coming out of an amp model can sometimes cause a lot of extra, unwanted distortion in the rotary effect. I’d start with the drive at zero and adjust up to taste in this instance.

Most people prefer to use the full amp models with the rotary effect. However, I’ve heard of some people liking to use the rotary effect after a preamp model, and then they will lean into the rotary’s drive knob. This is probably for a parallel path, or a patch where the rotary effect is never turned off.

Finally, I have to put out my standard disclaimer. There is no objectively wrong answer here. If it sounds good, then use it in that setting and enjoy. Users should use their ears and personal taste when setting this up. I’ve just outlined traditional settings for the rotary effects, but non-traditional tones can be exciting, groundbreaking, and inspiring. Dig in, folks!

— Ben Adrian

Tip: Parametric EQ Can Clean Up Bass and High Frequency Issues

Sometimes a particularly rough bass or high problem can be fixed using the parametric equalizer easier than high or low cuts. Often with lows you can clean up boominess with a 2 or 3 db cut in a fairly narrow Q in the frequency range around 180 to 220 hz. You can also take a bit of the edge off of highs without killing the whole range with a narrow cut of 2 or 3 db up around 4000 to 5000hz. Place this toward the end of your signal chain.

Tip: Depth Control Explanation

The Depth knob on both the Badonk and the Archetype is a control of the low frequencies in the negative feedback loop of the power amp. A simplified explanation is that it’s an active boost of the low frequencies between the preamp and the power amp. This is how a Presence knob works, but with the high frequencies. So you can think of the Depth control as a Presence knob for the low frequencies.

In addition, it un-dampens the low frequencies in the power amp and speaker interaction, which makes the low frequency a little less tame and controlled at the speaker. The whole power amp, speaker, negative feedback system can get pretty complicated. There is no need to go deep if you don’t want to. You can just use the simplified explanation above.

— Ben Adrian

Helix Firmware 2.21 Release Notes

Helix v2.21.0 is a firmware update that includes new fixes, stability improvements, and optimizations. It is highly recommended that all Helix users perform this update!


1. Shut down all Line 6 software as well as any software that streams audio, including, but not limited to: iTunes, Spotify, DAWs, browsers, etc.
2. Use your CURRENT EXISTING Helix application to back up all of your presets and IRs (if you want to keep them). For example, if you’re running Helix FW 2.00, your current Helix application version should be 2.00.
3. Quit the CURRENT EXISTING Helix editor application and download and install the LATEST Helix editor application (2.20), available here: http://line6.com/software/ This also installs the newest version of Line 6 Updater (1.11).
4. If you’re using Helix Rack with Helix Control, turn off Helix Control.
5. Using the latest Line 6 Updater (1.11), update Helix/Helix Rack to the newest firmware (2.21). At the end of the update process, Helix/Helix Rack will reboot automatically and begin rebuilding presets. Wait for this process to complete.
6. If you’re using Helix Control with Helix Rack, connect and power on Helix Control. The inspector will ask if you want to update its firmware. Press Knob 6 (OK). Wait for the update to finish.


7. To reset globals and restore presets, turn off Helix/Helix Rack/Helix LT.

HELIX FLOOR AND LT ONLY: While holding footswitches 9 and 10 (middle two switches on the bottom row), turn on Helix. Wait for the message “Will reset Globals and restore stock Presets, Setlists and IRs…” to appear and let go.

HELIX RACK ONLY: While holding knobs 5 and 6 below the screen, turn on Helix Rack. Wait for the message “Will reset Globals and restore stock Presets, Setlists and IRs…” to appear and let go.

8. Using the NEW Helix editor application (2.20), restore the user presets you backed up in step 2.

– Additional optimizations to the GUI engine

Bug Fixes
– Pitch/Synth > 3 Note Generator and 4 OSC Generator’s behind-the-scenes Trails parameter was disabled, making it appear as if the Decay parameter was broken – FIXED
– Distortion > Stereo > Clawthorn drive appeared slightly right of center – FIXED
– Engaging/bypassing a block from a Stomp switch was slower than normal – FIXED
– Turning the large Volume knob resulted in audible stepping while audio was active – FIXED
– In rare cases, changing cab mic models while Helix is synced to incoming MIDI clock could result in brief UI lockup – FIXED
– In rare cases, Helix could freeze when navigating the model list while receiving many tempo changes via MIDI clock – FIXED
– In rare cases, pressing a Stomp mode footswitch could transmit a single MIDI Clock pulse – FIXED
– In rare cases, Helix could freeze when accessing Global Settings while receiving MIDI Clock via USB – FIXED
– In rare cases, multiple bypass assigned footswitches with custom names can have bypass states swapped upon preset import – FIXED
– In rare cases, Helix can become unresponsive after copying specific block types onto another – FIXED
– Helix Rack/Control only: If an expression pedal is connected to Helix Control with its position set to heel down, its Global Settings > Pedals > Polarity is set to “Inverted”, and its Global Settings > Pedal > Pedal Position is set to “Global”, an audible blip can occur on preset load – FIXED
– Other bug fixes and optimizations

Known Issues
– If a Variax guitar is connected to Helix, MIDI channel 16 should never be used, as channel 16 is how Variax Workbench communicates with the guitar. This is by design. On a related note, Variax Workbench should never be used while MIDI tracks are armed or playing back in your DAW
– If Helix is set to a preset with a Pitch/Synth > Generator block on before beginning the firmware update process, a short burst of audio may be heard after presets are rebuilt
– If a user fails to read and follow the update instructions, Helix will add nine additional steps to the update process, one of which involves a shot of cheap mezcal