Sound designVocalsTalkbox Versus Vocoder
Both make an instrument talk. One uses your mouth as the filter, the other uses your voice as a control signal.

Four lo-fi characters, four different processes. Tape glues, vinyl adds a floor of noise, VHS wobbles, and radio closes the bandwidth from both ends.
Reaching for a lo-fi effect without deciding which one you want is how a track ends up dull instead of characterful. Tape, vinyl, VHS and radio degrade sound in genuinely different ways, and only one of them is likely to be the thing your track is actually missing.
Saturation, a gentle loss at the top, and a slow pitch drift from the transport. It is the most transparent of the four at low settings, which is why it works as glue: you can print a little across a drum bus and hear cohesion rather than an effect.
A narrower band with a lift through the mids, plus crackle, pops and dust. The noise floor is not a side effect here, it is the character. This is the one that reads as an old record rather than a warm one.
Degradation plus modulation. The wobble comes from the transport rather than the medium, so pitch moves in a way tape does not quite manage. Reach for it when a pad or a vocal should sound unstable on purpose.
Bandwidth restriction and static. The passband closes in from both ends, so the low end thins and the top rolls away together. That is what makes it read as distance: something playing through a speaker in another room rather than in front of you.
The useful question is not which character sounds best on its own. It is which one supplies the thing the arrangement does not have. Clean but disjointed needs glue, so tape. Clean and lifeless needs a floor to sit on, so vinyl. Too steady needs movement, so VHS. Too present needs bandwidth taken off both ends, so radio.
Auditioning all four on the same source and picking the biggest impression usually gets this backwards. Every one of these processes removes information, and the one that impresses fastest in solo is often the one that costs the most in the mix.
Character effects tend to be misused at the top of their range. A small amount is a mix decision and the listener never identifies it as an effect. A large amount is an arrangement decision and the listener hears it as a deliberate statement. There is not much useful ground between the two, so decide which one you are making before you set the amount.
For transitions, automate the depth rather than the wet and dry balance. Depth moving from nothing to heavy across two bars reads as a build. A wet and dry control doing the same thing has the untreated signal fighting the treated one the whole way, which smears instead of building.
Character is strongest as a decision about one element: the drums, the vocal, the sampled loop. Across a whole mix it is a blunt instrument, and the first thing a heavy pass takes is the low end you spent an afternoon getting right.
If you want a whole record to share a character, print it on the elements that should carry it and keep the low end out of that chain. The impression of a degraded medium comes from the mids and the top, which is where these processes do most of their work anyway.

RELIC is tape, vinyl, VHS and radio in one box, free with a Nolvra account.
Guides
You may also like
Sound designVocalsBoth make an instrument talk. One uses your mouth as the filter, the other uses your voice as a control signal.
Bass designSound designA reese is not a preset, it is an interference pattern. Two detuned saws moving in and out of phase, and a sub that has to stay out of it.