{"id":6188,"date":"2024-12-12T15:54:12","date_gmt":"2024-12-12T14:54:12","guid":{"rendered":"https:\/\/www.untergeek.de\/?p=6188"},"modified":"2025-04-21T17:05:41","modified_gmt":"2025-04-21T16:05:41","slug":"cp70-piano-for-the-iridium","status":"publish","type":"post","link":"https:\/\/www.untergeek.de\/de\/2024\/12\/cp70-piano-for-the-iridium\/","title":{"rendered":"David&#8217;s Waldorf CP70 \u2014 Creating sample maps for the Waldorf Iridium"},"content":{"rendered":"<div class=\"shariff\" data-title=\"David&#8217;s Waldorf CP70 \u2014 Creating sample maps for the Waldorf Iridium\" data-info-url=\"http:\/\/ct.de\/-2467514\" data-backend-url=\"https:\/\/www.untergeek.de\/wp-content\/plugins\/shariff-sharing\/backend\/index.php\" data-temp=\"\/tmp\" data-ttl=\"60\" data-service=\"gftr\" data-services='[\"googleplus\",\"facebook\",\"twitter\",\"reddit\",\"info\"]' data-image=\"\" data-url=\"https:\/\/www.untergeek.de\/de\/2024\/12\/cp70-piano-for-the-iridium\/\" data-lang=\"de\" data-theme=\"colored\" data-orientation=\"horizontal\"><\/div><p>The Waldorf Iridium is, amongst many other things, a sampler. And so many instruments have already been sampled &#8211; you will just have to load the samples to the Iridium, and place them in a patch.<\/p>\n<p>This post will try to create a patch with the sounds of a <strong>Yamaha CP70 electro-acoustic piano<\/strong>, and have a small script do most of the work. If you are kind of lost here, read the <a href=\"https:\/\/www.untergeek.de\/2024\/11\/a-not-so-grand-piano-for-the-waldorf-iridium\/\">&#8222;Not-so-grand-piano&#8220; post<\/a> first.<\/p>\n<p><!--more--><\/p>\n<p>The Yamaha CP70 is one of the instruments that made the sound of the 80s. Most people will probably recognise it instantly as &#8222;<a href=\"https:\/\/www.youtube.com\/watch?v=ljIQo1OHkTI&#038;t=94s\" target=\"_blank\" rel=\"noopener\">that piano from Alive &#038; Kicking<\/a>&#8222;. Genesis used it a lot on songs like &#8222;That&#8217;s All&#8220;. Peter Gabriel loved it.<\/p>\n<p><iframe loading=\"lazy\" title=\"Peter Gabriel playing Red Rain on the piano\" width=\"584\" height=\"329\" src=\"https:\/\/www.youtube.com\/embed\/B6kObgxGZl8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>I love Peter Gabriel&#8217;s music, so I needed to. Have. That. Sound.<\/p>\n<p>There is a set of sample that a guy called Conner Sawchuck created from the CP70 of his friend David. You can <a href=\"https:\/\/www.pianobook.co.uk\/packs\/davids-cp70\/\" target=\"_blank\" rel=\"noopener\">download the samples from David&#8217;s CP70 here<\/a> after registering for free.<\/p>\n<div id=\"attachment_6201\" style=\"width: 2570px\"  class=\"wp-caption alignnone\"><a href=\"http:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-6201\" src=\"http:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-scaled.jpg\" alt=\"A CP70 with a salt lamp sitting on top of it\" width=\"2560\" height=\"1920\" srcset=\"https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-scaled.jpg 2560w, https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-200x150.jpg 200w, https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-533x400.jpg 533w, https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-768x576.jpg 768w, https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-1536x1152.jpg 1536w, https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-2048x1536.jpg 2048w, https:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/CP70-original-400x300.jpg 400w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/a><p class=\"wp-caption-text\">David&#8217;s CP70. Photo comes with the sample pack. Salt lamp not included.<\/p><\/div>\n<p>Conner sampled the CP70 quite extensively, 29 notes from the 73-note range of the instrument (E1-E7).\u00a0 He recorded multiple samples for each key with different velocities. The 157 samples are nice and clean, but there are some things that need a bit of extra work:<\/p>\n<ul>\n<li>Some of the sample files have a little bit of whitespace before the sample plays, up to 40ms, which is audible.<\/li>\n<li>There is one small bug; one sample is named <code>F6 69-[1].wav<\/code> rather than <code>F6 69.wav<\/code><\/li>\n<li>I manually removed\u00a0<code>Db7 152.wav<\/code> because it came up empty to my code.<\/li>\n<li>You may want to amplify them a bit, as they peak around -12dB.<\/li>\n<li>Come to think of it: It&#8217;s also a problem that the lower-velocity samples are quieter than the higher-velocity ones.<\/li>\n<\/ul>\n<p>You might wonder why I think that the last point is a problem &#8211; after all, this is exactly the way we would have them. But it goes against the logic of a synthesizer playing samples.<\/p>\n<h2>All samples should have the same level, regardless of velocity<\/h2>\n<p>Remember <a href=\"https:\/\/www.untergeek.de\/2024\/11\/a-not-so-grand-piano-for-the-waldorf-iridium\/\">my last post, where I built the Not So Grand Piano from the KApro factory samples?<\/a> They are all the same level, for a reason.<\/p>\n<p>When you have different samples for a note played <em>pianissimo<\/em> as well as <em>fortissimo,<\/em> you would switch between samples, as a soft note has different overtones from a hammered note. <strong>But you would still want to play the samples at the same volume<\/strong> and control the volume of the note with the VCA. The oscillator changes the texture but not the volume.<\/p>\n<p>Rather than by playing back louder and quieter samples, which would give you a very limited number of dynamic steps, you would want to have continuous dynamic control via MIDI velocity. So unless you can find a way to program a different VCA velocity curve for each sample, they should be played back at the same volume by the oscillator.<\/p>\n<p>The Iridium does not feature a way to crossfade with velocity, so you still have audible jumps in the tone of a note once you cross the velocity threshold. You can simulate that up to a point by blending in the loudest samples with OSC2 and OSC3.<\/p>\n<h2>Preparing the samples from David&#8217;s CP70<\/h2>\n<ul>\n<li>Download and unpack the &#8222;David&#8217;s CP70&#8220; package for Kontakt.<\/li>\n<li>Put a small R script in the same download directory, and run it.<\/li>\n<\/ul>\n<p>The R script is nothing fancy &#8211; <a href=\"https:\/\/github.com\/untergeekDE\/Waldorf-Iridium-Sample-Maps\" target=\"_blank\" rel=\"noopener\">have a look at it in this repository<\/a>. As R is not as common as Python, you might get confused by the code processing the dataframe table (which is WAY more easy in <code>tidyr<\/code>\/<code>dplyr<\/code> than in Python&#8217;s <code>pandas<\/code>\u00a0 standard!) &#8211; it reads the samples, raises their levels to -6dB, records the maximum amplitude, and determins a velocity range for each of them. It then uses the information to write a <code>.map<\/code> file for the Iridium which will tell the sampler where to\u00a0 put each sample, and what to do with it.<\/p>\n<p>A documentation of the file format can be found <a href=\"http:\/\/www.untergeek.de\/wp-content\/uploads\/2024\/11\/iridium-maps-1.pdf\">here as a PDF<\/a>, and as a Markdown file as part of the github repository containing the code.<\/p>\n<ul>\n<li>A folder <code>\/samples\/DavidsCP70\/<\/code> containing the prepared sample files on the SD card. (The original sample folder is named <code>David's CP70<\/code> which leads to problems with the Iridium&#8217;s file system and is plain ugly.)<\/li>\n<li>A map file called <code>CP70.map<\/code><\/li>\n<\/ul>\n<p>Copy both of them to the root directory of your SD card, and insert it into your Iridium.<\/p>\n<h2>Getting the samples in place<\/h2>\n<ul>\n<li>Init a new sound, select a particle generator (i.e. sample player) for OSC1.<\/li>\n<li>Select the &#8222;Timbre&#8220; tab and press the <strong>&#8222;Actions<\/strong>&#8220; button. Press <strong>&#8222;Add&#8220;<\/strong> to get the samples. Navigate to the SD card by clicking on the &#8222;Internal&#8220; touch button top right until you get to <strong>&#8222;SD CARD&#8220;<\/strong>.<\/li>\n<li><strong>Import the complete folder of samples from the SD card. <\/strong>The manual does not tell you how to load a complete folder full of samples, and I discovered it by accident: Instead of selecting an individual sample, select the <code>\/samples\/DavidsCP70<\/code> folder, then press <strong>&#8222;Add&#8220;<\/strong>. The synth will now prompt you whether it should copy all the samples to internal memory; yes &#8211; <strong>select: &#8222;Copy&#8220;<\/strong>. They will all be copied to a folder <code>\/samples\/DavidsCP70\/<\/code> in internal memory now.<\/li>\n<\/ul>\n<p>My Iridium stalled after loading the last sample. If loading seems to take an undue amount of time while the progress bar is almost at the end, power-cycle the Iridium: the samples are in place now. Go back to an empty preset, init with OSC1 in particle mode.<\/p>\n<ul>\n<li>Load the map file now: Once again, press &#8222;<strong>Actions&#8220;<\/strong> then <strong>&#8222;Load Map&#8220;<\/strong>.<\/li>\n<\/ul>\n<h2>A Grand for 20: Iridium patch from the Keyboardwave CP70 samples<\/h2>\n<p>David&#8217;s CP70 samples make up a humble 140MB.\u00a0 A <a href=\"https:\/\/www.keyboardwaves.com\/cp-70-yamaha\/\" target=\"_blank\" rel=\"noopener\">commercial sample pack with three times the data can be bought for \u20ac18,90 from Keyboardwaves<\/a>. It features 6 level per note, at defined velocities, and all samples were recorded at the same level.<\/p>\n<p>Generating the map for this was pretty straightforward. I made two versions, one with only one oscillator (meaning: hard velocity switching between the samples, and one for two oscillators and a bit of overlap between the velocity zones. I used a trick to generate more texture levels between adjacent samples. Say you have sample A (low velocity) and sample B:<\/p>\n<ul>\n<li>Start with sample A from OSC1 at low velocities.<\/li>\n<li>At higher velocities, you have a zone with sample A reduced to two-thirds the gain, and OSC2 starts playing sample B, which is reduced to one-third of its gain.<\/li>\n<li>At velocities above that, a zone starts with sample A playing at one-third of its gain, and sample B playing at two-thirds.<\/li>\n<li>At highest velocities, we have switched to sample B from OSC2.<\/li>\n<\/ul>\n<p>You can use this method to create as many crossfade steps as you like.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Waldorf Iridium is, amongst many other things, a sampler. And so many instruments have already been sampled &#8211; you will just have to load the samples to the Iridium, and place them in a patch. This post will try &hellip; <a href=\"https:\/\/www.untergeek.de\/de\/2024\/12\/cp70-piano-for-the-iridium\/\">Weiterlesen <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":236,"footnotes":""},"categories":[9,353],"tags":[357,413,716,715],"class_list":["post-6188","post","type-post","status-publish","format-standard","hentry","category-maschinelles","category-musik","tag-sampler","tag-synthesizer","tag-multisamples","tag-waldorf-iridium"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>David&#039;s Waldorf CP70 \u2014 Creating sample maps for the Waldorf Iridium<\/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:\/\/www.untergeek.de\/de\/2024\/12\/cp70-piano-for-the-iridium\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:locale:alternate\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"David&#039;s Waldorf CP70 \u2014 Creating sample maps for the Waldorf Iridium\" \/>\n<meta property=\"og:description\" content=\"The Waldorf Iridium is, amongst many other things, a sampler. 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And so many instruments have already been sampled &#8211; you will just have to load the samples to the Iridium, and place them in a patch. 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