{"id":1930,"date":"2016-06-08T14:04:02","date_gmt":"2016-06-08T19:04:02","guid":{"rendered":"http:\/\/pugix.com\/synth\/?p=1930"},"modified":"2018-09-20T09:56:14","modified_gmt":"2018-09-20T14:56:14","slug":"mocante-investigations","status":"publish","type":"post","link":"https:\/\/pugix.com\/synth\/mocante-investigations\/","title":{"rendered":"Mocante Investigations"},"content":{"rendered":"

I learned more about Mocante today.\u00a0 The first investigation looked more closely at the CV and gate outputs.<\/p>\n

CV and Gate Outputs<\/h4>\n

I patched the CV output into the 1V\/octave control input of a VCO and monitored the control voltage coming out of the Mocante on a ‘scope.\u00a0 The first thing to note is that without any triangles pressed the output is centered around 4.5 volts bias and is quite noisy.\u00a0 Secondly, the position of the pitch basis pot is very important:\u00a0 it needs to be set at maximum to reduce the amount of noise when a triangle is pressed.\u00a0 Thirdly, if more than one triangle is pressed, the output appears to become undefined again.\u00a0 As for the Gate output, it is also very noisy unless the pitch basis is turned up fully.\u00a0 The Gate output could even be used as an audio noise source.<\/p>\n

Here’s the sound of stepping up the triangles when controlling an external VCO.\u00a0 For the second half I lowered the initial frequency of the VCO.<\/p>\n

All of the following recordings are of direct outputs of the Mocante.<\/h4>\n

Square Pad Octaves<\/h4>\n

For this investigation I probed each of the square tone output pads.\u00a0 Each of the 24 Mocante oscillators has 12 square pads associated.\u00a0 The point of each triangle pad indicates the center point of a group of four, which is three layers deep.\u00a0 Between the three layers runs a common terminal, which picks up the signals for routing to the Square Drones output.\u00a0 The 12 pads in each set correspond to 12 octaves, based on the common pitch basis.\u00a0 These are generated by digital division.<\/p>\n

\"mocante-square-tone-octaves\"<\/a>The diagram above shows the arrangement of the twelve octaves, from the perspective of looking at the surface directly in front of you.\u00a0 All 24 sets of 12 pads use this arrangement of octaves.\u00a0 The point of the triangle lies just below the line separating octaves 11 and 12.\u00a0 Unless you have tiny fingers, it is difficult to touch less than four squares at once.\u00a0 (And just above the inner pads, like the bending oval pads.)\u00a0 An obvious playing technique is to roll a finger across the pads, side to side and inner to outer, to pick up octaves selectively.\u00a0 Twelve octaves is a huge distance in pitch, and as you can see, the highest and the lowest share a boarder.\u00a0 At this time I haven’t any theory as to why Peter Blasser chose this particular arrangement.<\/p>\n

This recording of the Square Drones output demonstrates stepping up and down, staying mostly on pads 7,9,10,11.\u00a0 In the first part the pitch basis knob is centered.\u00a0 Then it is lowered.\u00a0 One surprise is that the intervals don’t always go upwards!\u00a0 Some step down in pitch.\u00a0 (A manufacturing error:\u00a0 wrong capacitor?)\u00a0 Also note, especially when the pitch basis is lower, the presence of tick sounds.\u00a0 These are the lowest octaves, which easily fall under 10 hertz.<\/p>\nhttps:\/\/pugix.com\/synth\/wp-content\/uploads\/2016\/06\/square-tone-steps.mp3<\/a><\/audio>\n

 <\/p>\n

The next recording demonstrates the various octaves, keeping the finger on only one set of 12 pads.\u00a0 I played around with the pitch basis knob, and bumped the bending ovals a little.<\/p>\nhttps:\/\/pugix.com\/synth\/wp-content\/uploads\/2016\/06\/square-one-set.mp3<\/a><\/audio>\n

Witches Tones Outputs<\/h4>\n

Probing the circular pads, I discovered a strong, steady square wave (that degenerates to a triangle at very high frequencies) being put out on each circle.\u00a0 Something happens internally, so that when touched, the resulting output is a complex cross-modulation of some kind.\u00a0 I wish I had a schematic!\u00a0 The Soft Witches Tones output remains at a constant level, while the Hard Witches Tones is gated on and off by touching the circles.\u00a0 Here is what the Hard Witches Tones output sounds like.<\/p>\nhttps:\/\/pugix.com\/synth\/wp-content\/uploads\/2016\/06\/witch-tones.mp3<\/a><\/audio>\n

An Improvisation<\/h4>\n

I did a little improvisation, combining the square and witch tones and playing with multiple fingers.<\/p>\nhttps:\/\/pugix.com\/synth\/wp-content\/uploads\/2016\/06\/mocante-improv-2.mp3<\/a><\/audio>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

I learned more about Mocante today.\u00a0 The first investigation looked more closely at the CV and gate outputs. CV and Gate Outputs I patched the CV output into the 1V\/octave … Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":1922,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[127],"tags":[171],"class_list":["post-1930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciat-lonbarde-instruments","tag-mocante"],"yoast_head":"\nMocante Investigations - Richard Brewster's Electronic Sounds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pugix.com\/synth\/mocante-investigations\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mocante Investigations - Richard Brewster's Electronic Sounds\" \/>\n<meta property=\"og:description\" content=\"I learned more about Mocante today.\u00a0 The first investigation looked more closely at the CV and gate outputs. 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