Perpetuum Impromptu This album is filled with feedback signals, strange instruments, "normal" instruments, solo's, duos and trios. Finding beauty and wonder in timbre, tone and, textures that will never stop in an ongoing improvisation, a "Perpetuum Impromptu." I explore some new territories. I use electronic's that fascinates me, like (modular) synth, tape recorders, and the NIM. It started with getting to know about this instrument called "No Input Mixer" (NIM). This is a mixing board where you feed the output back into an input, creating a feedback signal which you can manipulate and play with. It is very sensitive and comes with heavy dynamic's, frequencies and gain. I simply love the sound. Exploring with noise, timbre, rhythm, and tones on this "instrument" is incredible. Being a piano player, I was wondering what would happen when I would simultaneously improvise on the piano or synthesizer in a strange kind of duo with myself. A similar thing happened with improvising alongside my modular synth. On the pieces "Perpetuum" and "Impromptu," I made a so-called "Krell-Patch" (a patch originally invented by Todd Barton). Here also I play with feedback signals but in a very different way and creating ever-changing tones and timbres. Compared to the NIM, the instrument is moving almost entirely autonomous. Until I pull the plug it'll keep playing forever, so it's is like an "ongoing improvisation," hence the album title. Because two voices are improvising in the modular and me on the piano, you can say it is a trio improvisation. Then there is Tape. Tape in itself is a lovely medium with a beautiful sound and liveliness. I used my Arp mono-synth to play alongside the tape-recorders, and again there's also a feedback signal from the tape to itself. Again creating an ever-changing textural improvisation in a duo endeavor with myself letting the tape recorder do its thing and me playing the synth. On the piece Kuonnaj there's a different kind of duo going on in the sense of an actual duo with another person than me. I asked Tobias Kerkhoven to play and be creative. He pulled out his own electronics and his guitar against my NIM. Doing an excellent job playing with sound design, creating a beautiful ambiance, and having a very original take on this. As said at the beginning, an album filled with feedback signals, strange instruments, "normal" instruments, solo's, duos and trios. Ongoing improvising with tone, timbre, textures that will never stop it is a true "Perpetuum Impromptu." Credits: Music and performance by Raoul van Herpen - Piano, No Input Mixer, (Modular) Synthesizers, Tape-recorders. Special feature on "Kuonnaj" by Tobias Kerkhoven - Guitar and electronics. Mixing by Raoul van Herpen Mastered by Nathan Moody at Obsidian Sound (obsidiansound.net)