-12 octave patch dulling top end

[russebert]

Hi everyone, I’m having trouble with an acoustic preset and hoping someone can help. 

I found a tutorial somewhere on emulating the polyphonic octave effect of the Boss OC-5. It works by setting a split crossover at a low frequency (I have mine at 100 Hz) and directing that path to a pitch shift set to -12 interval. This gives me the option to add “bass notes” when playing with my acoustic duo. Very useful. 

However, when I engage the crossover I’m losing brightness and volume from my original, un-pitch-shifted path. My top end significantly dulls.

Any ideas what I need to tweak?

- Helix LT (firmware 3.60.0)
- global eq off
- problem occurs with all output options and in both stereo and mono versions of the preset
- signal path splits after preamp, EQ, and compressor, and rejoins before some subtle reverb, a return for some foot percussion pads, and my looper

[Schmalle]

The attached file is empty.

[craiganderton]

Unfortunately I've used up my forum space for posting images or audio. However the "Bass Blast" tip in The Big Book of Helix Tips and Tricks adds a parallel bass track to the main guitar sound, which works much better for me than using the frequency split crossover. The parallel path means the main guitar path has nothing to do with the bass path, so that should keep your high end from sounding dull. Here's the description of what's in the bass path, hopefully it will be of some help:

 

Adding two EQs before the Poly Capo helps keep the higher notes from reaching the Poly Pitch block. The first EQ cuts out everything except the low notes, and uses a 10 Band Graphic EQ. The second EQ boosts the low note levels with a Parametric EQ. As a result, you hear only the guitar’s lower strings play an octave lower. The compressor that follows the Pitch block helps bring up the sustain, which makes the low frequencies sound more like a bass.

 

The level going into the Poly Capo is relatively low, so its Level adds +6.0 dB. The Mixer adjusts the balance between the amp path and the bass path. You may want less bass level than the preset’s default setting.