The sample are mixed and processed. The fade-in/stopping done by filters & the noises, the full sample done by glitching, granulize & adding more sounds: doorclosing, drive starting, -stopping & dooropening/drive ending.
Italian subway station ambience. Recorded inside the train, near the pa loudspeaker. Speaker says: "fermata gioia" (translation: "gioia station"). Recorded with a p9 lite using rec forge ii.
Mono field recording of the subway - ttc - in toronto, ontario, canada. Station announcements can be heard, but aren't legible. Includes subway chimes. Subway car stops and starts at three stations.
An ambient sound, best experienced ina quiet environment, as the sound isbest enjoyed at a moderate volume level. Completely manufactured or created withaudacity with a basic noise file. There are very slight nuances ordiscrepancies with the sound; it it nota perfect monotone track, given theinitial sample is not a tone but a whitenoise sample.
Using beepbox. Co, i accidentally made a sound similar to my fm radio being unable to pick up a station. I keep my radio in my basement, so sometimes it can't pick up some frequencies right away, producing this noise.
A mediocre recording of the nyc subway, with the robot announcer saying "stand clear of the closing doors". I am releasing this sample into public domain, ignore the cc license.