re: portamento Thanks. I had experimented with amp envs, and overshoots and undershoots for durs but hadn't considered timbre or spectral changes. I'll think about that. Regards, Jim ________________________________ From: cmdist-boun...@ccrma.stanford.edu <cmdist-boun...@ccrma.stanford.edu> on behalf of cmdist-requ...@ccrma.stanford.edu <cmdist-requ...@ccrma.stanford.edu> Sent: Tuesday, April 19, 2022 9:00 AM To: cmdist@ccrma.Stanford.EDU <cmdist@ccrma.Stanford.EDU> Subject: Cmdist Digest, Vol 167, Issue 4
Send Cmdist mailing list submissions to cmdist@ccrma.stanford.edu To subscribe or unsubscribe via the World Wide Web, visit https://cm-mail.stanford.edu/mailman/listinfo/cmdist or, via email, send a message with subject or body 'help' to cmdist-requ...@ccrma.stanford.edu You can reach the person managing the list at cmdist-ow...@ccrma.stanford.edu When replying, please edit your Subject line so it is more specific than "Re: Contents of Cmdist digest..." Today's Topics: 1. portamento (James Hearon) 2. Re: portamento (b...@ccrma.stanford.edu) ---------------------------------------------------------------------- Message: 1 Date: Tue, 19 Apr 2022 18:02:57 +0000 From: James Hearon <j_hea...@hotmail.com> To: "cmdist@ccrma.Stanford.EDU" <cmdist@ccrma.Stanford.EDU> Subject: [CM] portamento Message-ID: <byapr10mb2536279f4adfe75d708a4af5e5...@byapr10mb2536.namprd10.prod.outlook.com> Content-Type: text/plain; charset="iso-8859-1" Hi, I'm trying to come up with an approach to portamento note phrasing. Best I've been able to do is work with gliss. I'm wondering if this is on the right track for how this is usually handled? Regards, Jim (definstrument (myport start-time duration frequency start-freq end-freq (amp-env '(0 0 1 1 2 1 3 0)) sampling-rate) (let* ((beg (floor (* start-time sampling-rate))) (end (+ beg (floor (* duration sampling-rate)))) (sine-wave (make-oscil :frequency frequency)) (ampf (make-env amp-env :duration duration :scaler 1.0)) (frqf (make-env '(0 0 1 1) :scaler (hz->radians (- end-freq start-freq)) :duration duration :base 0.67)) ) (do ((i beg (+ i 1))) ((= i end)) (outa i (* (env ampf) (oscil sine-wave (env frqf) ))) (outb i (* (env ampf) (oscil sine-wave (env frqf) ))) ))) (with-sound (:srate 48000 :channels 2 :header-type mus-riff :play #t) (myport 0 1 300 300 400 '(0 1 1 .3) 48000) (myport 2 1.5 400 400 300 '(0 .3 1 .3) 48000) ) -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://cm-mail.stanford.edu/pipermail/cmdist/attachments/20220419/d9797a0a/attachment-0001.html> ------------------------------ Message: 2 Date: Tue, 19 Apr 2022 11:33:08 -0700 From: b...@ccrma.stanford.edu To: James Hearon <j_hea...@hotmail.com> Cc: "cmdist@ccrma.Stanford.EDU" <cmdist@ccrma.Stanford.EDU> Subject: Re: [CM] portamento Message-ID: <6d4807c522ab6c39450fd9c424e81...@ccrma.stanford.edu> Content-Type: text/plain; charset=US-ASCII; format=flowed I think in the context of sound synthesis, portamento is a glissando between two notes. It would be interesting to get a vocal or violin recording of someone using portamento, and try to imitate it -- I think you'll also need an amplitude envelope. Seashore wrote about it, saying something like "it starts below the first note and overshoots its target", if I remember right. You might also need to change the timbre en route. ------------------------------ _______________________________________________ Cmdist mailing list Cmdist@ccrma.stanford.edu https://cm-mail.stanford.edu/mailman/listinfo/cmdist End of Cmdist Digest, Vol 167, Issue 4 **************************************
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