Certainly Parker on ECM isn't only electro-acoustic - ref. David Ayers point above and also his trio recordings with Bley. Not forgetting that storming solo on the first track of Wheeler's Around 6 and other contributions to KW's works on the label.
Interesting, I wonder what it is that makes you feel that about these electro-acoustic recordings? Do you have similar feelings about other EA recordings of his, I'm thinking PSI releases? do you find them less interesting in comparison to other EA composers/improvisors or in comparison to othe Evan Parker ensembles?
I'm no expert in this field and I found that my initial exposure to Parker's EA ensemble opened a route into a new type of music - so maybe I've a soft spot for them. Certainly the live performance by this ensemble I witnessed was a musically and almost physically extraordinary experience.
Maybe it is because I came into electro-acoustic music at the deep end of the swimming pool--AMM, Keith Rowe/Toshi Nakamura, Sachiko M, all the stuff on Erstwhile and other labels. Then later I listened to the Evan Parker recordings. They just didn't match my expectations. Maybe it's just that the label (Electro Acoustic Ensemble) is all wrong.
Well, consider that electro-acoustic improvisation really started in the late '60s with AMM, the New Music Ensemble, David Behrman's work, Musica Elettronica Viva, Gentle Fire ... some of that stuff is blindingly harsh music, other aspects more contemplative, and I think that some of the best examples really retain the spirit of improvisational risk, throwing shit at the wall and it just may not stick. Evan Parker was working with Hugh Davies (Gentle Fire) around the turn of the 70s, and Paul Lytton also brought an electronically-expanded approach to sound and rhythm in the duo that they had through the '70s and '80s. Parker's been doing Electro-Acoustic music his way for 40 years, and it may not be as rarefied an approach as one encounters on Erstwhile discs, but it's in keeping with the sense of risk and humor that pervaded the earlier work.