A short melody created in bosca ceoil and then pitch shifted and notch filtered in audacity. No rights reserved and no attribution needed. Boost no ills.
My fingernails rubbing horizontally on a green chalk board. Possible uses:scraping chalk boardinsect buzzing wings. Recorded with a zoom h1 in a classroom.
Rough, rubbery sounding scraping noises, very clean despite being recorded very close to the sound source. Recording ends with a slightly different, more near-field scraping sound, rising in pitch.
By tapping the back of my lap top, i made an unusual heartbeat. Removed hissing, added a deeper pitch and deleted certain beats for a somewhat rhythmic beat.
Synthesized sawtooth sound with increasing pitch. An initial click and noise are added. The sound is low-pass filtered using a cutoff frequency that increase during the sound.