An ADAU1452 "Vocal Sweetener"
Spectral analysis of several American Idol contestants' voices showed me that those which sound good to me also feature a strong second harmonic. It's well known that tube guitar amplifiers are preferred for their second-harmonic distortion when overdriven (as guitar amplifiers often are). Thus, can we artificially boost the second-harmonic content of a singer's voice? This project attempts to do so by a straightforward method. Below shows a portion of one of the 12 hierarchy boards in the project -- one for each note in an octave of piano keys.
The project measures the ratio of each frequency channel's level to the composite level. Anything detected boosts the level of the next channel at twice the frequency. The ratios are taken with the -1452's log and antilog blocks to save instructions.
Playing a podcast through this project, it tends to increase vocal "presence" when the effect level is set moderately. At an extreme setting a podcast voice transforms into something like that of an over-processed FM radio announcer. The project is attached in case anyone might wish to try it.
Audio Signal Processors
adau1452
effect
voice
adau145x
SigmaDSP Audio Processors
Show More
Thanks for the post, I learn so much from looking at these projects. I've just been looking over a vocoder that I think was one of yours and I learned how you could do Alias connections.
regards
PhilipJ
Hi KJBob,
Is something like this also possible on the ADAU1701? On my project i miss a lot of vocal and instrument presence. Maybe this will help.
Greetings
Hello papejelly,
I'm afraid that the "vocal sweetener" project uses nearly all the ADAU1452's instruction capability -- thus it's way too much for a ADAU1701. Occasionally I've made scaled-back versions of similar projects for a -1701 with varied results. This project is particularly difficult because it runs filters to cover a wide frequency range in 1/12 octave (piano key) intervals. Thus cramming this function into a -1701 means cutting way back on the number of filters, which will drastically affect its performance.
Likely you have already tried for example, applying EQ filters to boost the presence of your sound but have not attained the desired result. Perhaps if you could describe what you have already tried yet what's still lacking in the sound, this may help me think about a different solution which can fit into a -1701.
Best regards,
Bob
Thanks for the fast reply KJBob! I will make a new thread because i dont want to spam this one.
Could we simplify this by generating even harmonics for all frequencies without the isolation of the voice?
Please log in to reply.