Good question
The main reason is the dynamics and control having it on hum gives you.
I could absolutely be wrong as I haven’t studied the configs but when playing a track it seems that it’ll play in the background whilst everything else is playing.
The speakers in the LGT sabers have a pretty sub-par speaker, there really isn’t a lot of room in terms of frequency because the speaker flattens the sound profile, there’s no staging and it’s a single speaking so mono, meaning no depth from stereo or panning options.
All due to it’s size of course, can’t really be helped.
With music on hum you can control the hum duck, this is really important for sound engineering because in order for sounds to work well together you need to carve out space in the sound for other frequencies.
If I had music playing from a “track” and not a hum, lets say that track had high hats in it, that would be around 20,000hz on the top end, if a saber accent swing or something was in the same frequency the sound would be very muddy, just sound like garbage really.
In an ideal world you’d work with high and low pass filters to remove certain frequencies so that other sounds can fill that gap, allowing for multiple sounds to be played with clarity.
Due to the speaker limitations we have to rely on some of the features you have for ducking, this makes carving out space a little less important. As the volume of the hum drops other sounds can take the frequency space without it sounding muddy.
You can think of it like this: playing a “track” is like covering the bottom of your speaker all the time, and using a hum is like having the speaker uncovered, there’s a lot more clarity in the sound.
If you’re trying to make a really good sound font that will bring the saber to life, you have to think about the frequency space, otherwise the sounds themselves will be of a good quality but in application, they will sound terrible in comparison.
Initially I thought about upgrading the speaker on the saber but realistically the bulk of people using Proffie or LGT-type sabers aren’t going to do that, so when creating fonts I think it’s important to use the equipment that the font will be most widely used on.
Having duck really allows us to keep a lot of the frequencies in each sound file because we can simply lower the volume of one sound when another is playing. This means more diverse frequencies can be used for each sound, rather than having to do something like this if you were using track:
Hum - base heavy saber sound
swing - mid frequency sound
Accent - high frequency sounds
Here you’d want to cut some mid frequencies from Hum to avoid muddying the hum/swing
Cut lower frequencies from swing if needed as not to muddy hum/swing
Cut the higher frequencies of swing as not to muddy swing/accent
Cut the lower frequencies of Accent as not to muddy swing/accent
Obviously this depends hugely on the frequencies within each sound, which sounds you can duck and which ones you can’t, etc.
For this reason, hum works very well as a track in my opinion.
I definitely need to look and play with this more though as I’m far more familiar with other aspects of Proffie than I am with the specifics of “track” at this point in time.
What do you think? Would love to hear your thoughts 