don't understand some guitar techniques in cdlc

[rrp]

15 step - radiohead , seems like i'm supposed to hammer on notes with no previous note on the string. how does one achieve that? https://ignition4.customsforge.com/cdlc/3235

dramamine - modest mouse, how are you supposed to bend the harmonics at the beginning of this song? https://ignition4.customsforge.com/cdlc/10909

[coldrampage]

9 hours ago, rrp said:

15 step - radiohead , seems like i'm supposed to hammer on notes with no previous note on the string. how does one achieve that? https://ignition4.customsforge.com/cdlc/3235

For the this one I'm just assuming it's a bad tab/chart, since it's also telling you to pull off notes that you can't. It's likely that they are supposed to be on the note afterwards, like here you're supposed to pull off to the 0 but it's marked on the 9 instead.

I'd just ignore it and play how it sounds best.

9 hours ago, rrp said:

dramamine - modest mouse, how are you supposed to bend the harmonics at the beginning of this song? https://ignition4.customsforge.com/cdlc/10909

With a tremolo system.
Although natural harmonics are supposed to be charted without sustains (and bends) for detection reasons.

[Shroud]

13 hours ago, rrp said:

15 step - radiohead , seems like i'm supposed to hammer on notes with no previous note on the string. how does one achieve that? https://ignition4.customsforge.com/cdlc/3235

dramamine - modest mouse, how are you supposed to bend the harmonics at the beginning of this song? https://ignition4.customsforge.com/cdlc/10909

I don't know the two songs in question, but "hammer-on from nowhere" is definitely a guitar technique, for example Joe Satriani does it very often.

"Pull-off from nowhere" is not strictly impossible (you could pull the string slightly sideways without pressing down i.e. without producing a note, then release it to cause the pull-off and play the empty string) but it's definitely awkward and I couldn't quote a single example song that uses it.

"Bending harmonics" can be done with the whammy bar (as coldrampage already said). I recommend listening to "Where were you" and "Two rivers" by Jeff Beck (from the album "Jeff Beck's Guitar Shop") and to the solo of "Frank" by Steve Vai (from the album "The Ultra Zone"), all of which contain masterful examples of bending harmonics