tag:blogger.com,1999:blog-73773861401672365772024-02-19T05:01:56.600-08:00Lineal TML 01 - Analog SynthesizerThis page shows my analog synthesizer project. I want to share ideas and tips.Unknownnoreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7377386140167236577.post-89535267469093745692010-03-17T16:24:00.000-07:002010-03-17T18:50:18.388-07:00Analog DCO<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjVccmyBgvVbEasE48wUI0glKwuZKoWRLLqFU7voL4Day2kajTYcyx6zXvh1ldiVrezjHLXHbqymKNNwAYkGrsHl9L_Xoq08AEEV_962ouvfJm1WqY9Tfed5IcSjBmA0Lh9nKcmu0tASW8/s1600-h/Analog+DCO.jpg"><img style="float: right; margin: 0pt 0pt 10px 10px; cursor: pointer; width: 320px; height: 226px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjVccmyBgvVbEasE48wUI0glKwuZKoWRLLqFU7voL4Day2kajTYcyx6zXvh1ldiVrezjHLXHbqymKNNwAYkGrsHl9L_Xoq08AEEV_962ouvfJm1WqY9Tfed5IcSjBmA0Lh9nKcmu0tASW8/s320/Analog+DCO.jpg" alt="" id="BLOGGER_PHOTO_ID_5449771447466078690" border="0" /></a><br />I want to share this circuit I design for a Poly Synth. VCO are not so good, in my opinion, for polysynths. this digitally controlled analog oscilator have the characteristic lineal response (not discrete) of VCO and controlled pitch without unwanted detunes among different voces.<br /><br />The circuit is a constant current source that charge a capacitor. The time constant is controllated by R1 and C1. Q1 discharge the capacitor by uC when it's supposed to. The circuit needs a uC that generate the clock frequency and CV (16 bit prefered) because log response.<br /><br />the uC has to simmulate portamento, pitch bender, note on/off, etc.<br /><br />Please, test it before use!!Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7377386140167236577.post-41039094214214751942009-01-16T17:58:00.000-08:002009-01-16T19:44:41.661-08:00Demo 6This video shows some capabilities of the synth.<br /><br />I played in unison a piano patch on my JV-80 and a typical synth sound on the TML-01 in unison, linked via MIDI cable. The TML-01 is a mono synth with upper note priority so I tried to play the melody with using the upper voice. <br /><br />The performance was more or less improvised on the fly so you can hear some note and tempo mistakes. <br /><br /><object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/65sMB7isXUQ&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/65sMB7isXUQ&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7377386140167236577.post-78343768158298073902008-12-03T16:06:00.000-08:002008-12-03T17:33:21.062-08:00Yazoo - Dont' GoThis audio shows many sounds<br />I created with my synth<br /><br /><object width="353" height="132"><embed src="http://www.goear.com/files/external.swf?file=5f1c984" type="application/x-shockwave-flash" wmode="transparent" quality="high" width="353" height="132"></embed></object><br /><br />Except drums and singer, all you can<br />hear comes from the synth.<br /><br />I haven't sequenced this song<br />I only modified and remixed the MIDI file,<br />added voice track, added some other things and<br />rendered all sounds with the synth<br />In almost all tracks I added some delay or<br />reverb effects.<br />Sorry I don't know who has<br />sequenced this song,<br />I just got the file from the Internet.<br /><br />Music & Lyrics: Vince Clarke<br /><br />Here YouTube version:<br /><br /><object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/blW8yZoXZS0&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/blW8yZoXZS0&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-7377386140167236577.post-48905735915800212422008-11-21T16:05:00.000-08:002008-11-21T18:26:31.280-08:00Portamento ModsIn this video I show you the last mod to my synth. The actual portamento circuit has a logarithmic response since I use a simple passive RC network ((it's important to say that the circuit has a logarithmic response but when you applied to a 1 Oct/volt VCO you cancel the log effect, cause the expo response of the VCO, and you obtain a linear response in frequency, buy musical tones are distributed exponentially in the frequency range so this linear in frequency response in not musically natural)). <a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyw7L8upKaS01v7aEXYP94BjzmzC8p1rw1iLp3gglVEhIRtnxrWB5KGYvpDnwr0Xd0fhFNxwyxdWGkQTi1r-AbsuKc2KGhJ-lvFPFwKOC5Nz0Whutt-kLHehDJEoxN8iVtPh8cUyRZO9c/s1600-h/Diapositiva1.JPG"><img style="margin: 0pt 0pt 10px 10px; float: right; cursor: pointer; width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiyw7L8upKaS01v7aEXYP94BjzmzC8p1rw1iLp3gglVEhIRtnxrWB5KGYvpDnwr0Xd0fhFNxwyxdWGkQTi1r-AbsuKc2KGhJ-lvFPFwKOC5Nz0Whutt-kLHehDJEoxN8iVtPh8cUyRZO9c/s200/Diapositiva1.JPG" alt="" id="BLOGGER_PHOTO_ID_5271268946469284722" border="0" /></a><br />The result is a fast sweep at then beginning and a slow sweep at the end of the portamento effect. You can hear this effect at the beginning of Erasure’s Chorus. Many synths have this type of portamento but I don't like it. There are other electrical negative effects when the value of R is very high (R is a 1Mb potentiometer which change the portamento time), at this point the output voltage never riches the input voltage, I don't know why. Although, I suppose this is a defect of my design.<br /><br />So, I decided to replace this circuit with one with linear response (ex<a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEAjEDtLKq_DFQPUi2bcXH0eTXDHaAc4bhxjeqy5T2XC6dGEWdIlP4CZh5kEmcaJaZg5Qp39OhbbpKxqphCRu8KWZJItO13oY6CB4fdLtFnCz1o2g1Fo1l12maXV78YLV0y0pDNEnZZrk/s1600-h/Diapositiva2.JPG"><img style="margin: 0pt 0pt 10px 10px; float: right; cursor: pointer; width: 200px; height: 150px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhEAjEDtLKq_DFQPUi2bcXH0eTXDHaAc4bhxjeqy5T2XC6dGEWdIlP4CZh5kEmcaJaZg5Qp39OhbbpKxqphCRu8KWZJItO13oY6CB4fdLtFnCz1o2g1Fo1l12maXV78YLV0y0pDNEnZZrk/s200/Diapositiva2.JPG" alt="" id="BLOGGER_PHOTO_ID_5271268949980365426" border="0" /></a>ponential effect in frequency when applied to the VCOs). The circuit is very simple too. It uses an integrator Op Amp network placed in output of other op amp before its feedback network. When you apply a specific voltage to the input the output try to replicate the input but the integrator network produce a controlled linear slew rate.<br />I want to replace the old circuit with the new one but in a fast and simple way, so I build a little daughter board that I placed in the dip socket of the old circuit buffers Op Amp (TL 082). With this I can back to the old circuit just taking of the daughter board and placed an OP Amp in the socket.<br /><br /><object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/zfonUV8HXJg&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/zfonUV8HXJg&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object><br /><br />Another possibility of the new circuit is the asymmetrical portamento. A diode placed in parallel with the rate potentiometer produce the portamento effect when you play upping phrases and cancel the effect when you play down way phrases. The new circuit has this facility but I don't use it yet because I have to put a switch in the front panel.Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-7377386140167236577.post-6353656208769182382008-11-18T18:50:00.000-08:002008-11-18T19:40:14.881-08:00ElectronicsThe following video shows the inside of the synth. You can see a lot of wires and circuit boards. You can see that I have only used printed circuit boards for microcontroller board because its complexity.<br /><br /><object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/4IWw3ylSjak&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999"><param name="allowFullScreen" value="true"><param name="allowscriptaccess" value="always"><embed src="http://www.youtube.com/v/4IWw3ylSjak&hl=en&fs=1&rel=0&color1=0x3a3a3a&color2=0x999999" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>Unknownnoreply@blogger.com0