{"id":2545,"date":"2022-02-01T11:35:38","date_gmt":"2022-02-01T09:35:38","guid":{"rendered":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545"},"modified":"2026-02-17T14:26:12","modified_gmt":"2026-02-17T13:26:12","slug":"tda-1540-nos-non-over-sampling","status":"publish","type":"post","link":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545","title":{"rendered":"TDA 1540 NOS – Non Over Sampling good idea.?"},"content":{"rendered":"

TDA 1540 NOS – Non Over Sampling good idea.? \u00a0Truncating 2 bits ?<\/strong><\/p>\n

Some qoutes from internet<\/p>\n

“Absolutely no doubt that this mod has a fantastic effect on the sound, there’s no going back to OS for me!”<\/strong><\/em><\/p>\n

“The sound is unique, sweet, clear and full of detail that the newest cutting edge delta sigma DAC can never produce. If you haven’t taste this kind of sound before it’s definitely a regret for an audiophile. It’s like compare Vinyl and CD, Rollling shutter and global shutter in the DSLR.” \u00a0?<\/em><\/strong><\/p>\n

Is removing the SAA7030 \u00a0a good idea ? please read — Digital-to-analog conversion in playing a Compact Disc<\/a><\/span><\/p>\n

\"\"<\/p>\n

 <\/p>\n

A Modification board ” NOS plus reclocking.?! ” , this board shift 2 audio bits<\/p>\n

\"\"<\/p>\n

Timing to TDA1540 After modification , dumping 2 \u00a0LSB bits without adding dither \u00a0, why.? , it will increase quantization noise<\/p>\n

\"\"<\/p>\n

Now the measurements<\/p>\n

Philips CD 204 Orginal<\/p>\n

\"\"<\/p>\n

With NOS modification , increased distortion<\/p>\n

\"\"<\/p>\n

Mutltitone -20 dBfs 20-96000 Over Sampling<\/strong><\/p>\n

\"\"<\/p>\n

Mutltitone -20 dBfs 20-96000 Non Over Sampling , \u00a0high frequency roll-off , and aliasing products above 22.5 kHz<\/strong><\/p>\n

\"\"<\/p>\n

Multitone -20 dBFs 20-96000 Hz compare Over Sampling vs Non Over Sampling \u00a0Log<\/strong><\/p>\n

\"\"<\/p>\n

Multitone -20 dBFs 20-96000 Hz compare Over Sampling vs Non Over Sampling \u00a0Lin<\/strong><\/p>\n

\"\"<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

Freq. Sweep Non Over Sampling 0dB fs , `High freqeuncy roll ons\u00a0<\/strong><\/p>\n

\"\"<\/p>\n

 <\/p>\n

Freq. Sweep Non Over Sampling -1dB fs close-up<\/strong><\/p>\n

\"\"<\/p>\n

1 kHz -20 dBfs compare Over Sampling vs Non Over Sampling<\/strong><\/p>\n

\"\"<\/p>\n

1 kHz -60 dBfs compare Over Sampling vs Non Over Sampling<\/strong>\"\"<\/p>\n

THD measured in Philips CD 104 with NOS Modification + Reclocker<\/p>\n

\"\"<\/p>\n

 <\/p>\n

\"\"<\/p>\n

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

TDA 1540 NOS – Non Over Sampling good idea.? \u00a0Truncating 2 bits ? Some qoutes from internet “Absolutely no doubt that this mod has a fantastic effect on the sound, there’s no going back...<\/p>\n","protected":false},"author":1,"featured_media":8587,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,182,251],"tags":[41,43],"class_list":["post-2545","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-measurement","category-nos","category-tda1540","tag-tda-1540","tag-tda-1540-nos"],"yoast_head":"\nTDA 1540 NOS - Non Over Sampling good idea.? - Bram Jacobse<\/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.bramjacobse.nl\/wordpress\/?p=2545\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TDA 1540 NOS - Non Over Sampling good idea.? - Bram Jacobse\" \/>\n<meta property=\"og:description\" content=\"TDA 1540 NOS – Non Over Sampling good idea.? \u00a0Truncating 2 bits ? Some qoutes from internet “Absolutely no doubt that this mod has a fantastic effect on the sound, there’s no going back...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545\" \/>\n<meta property=\"og:site_name\" content=\"Bram Jacobse\" \/>\n<meta property=\"article:published_time\" content=\"2022-02-01T09:35:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-17T13:26:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2022\/01\/NOS_MOD_Explan.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Bram\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bram\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545\"},\"author\":{\"name\":\"Bram\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/046607e546e3a7190b34f7793abbe6fe\"},\"headline\":\"TDA 1540 NOS – Non Over Sampling good idea.?\",\"datePublished\":\"2022-02-01T09:35:38+00:00\",\"dateModified\":\"2026-02-17T13:26:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545\"},\"wordCount\":272,\"publisher\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/046607e546e3a7190b34f7793abbe6fe\"},\"image\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/NOS_MOD_Explan.png\",\"keywords\":[\"TDA 1540\",\"TDA 1540 NOS\"],\"articleSection\":[\"Measurement\",\"NOS\",\"TDA1540\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545\",\"url\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545\",\"name\":\"TDA 1540 NOS - Non Over Sampling good idea.? - Bram Jacobse\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/NOS_MOD_Explan.png\",\"datePublished\":\"2022-02-01T09:35:38+00:00\",\"dateModified\":\"2026-02-17T13:26:12+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#primaryimage\",\"url\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/NOS_MOD_Explan.png\",\"contentUrl\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/NOS_MOD_Explan.png\",\"width\":1280,\"height\":800},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?p=2545#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"TDA 1540 NOS – Non Over Sampling good idea.?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#website\",\"url\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/\",\"name\":\"Bram Jacobse : Tinkering CD Players & Digital Audio\",\"description\":\"Tinkering CD Players & Digital Audio\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/046607e546e3a7190b34f7793abbe6fe\"},\"alternateName\":\"Bram Jacobse : Tinkering CD Players & Digital Audio\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/046607e546e3a7190b34f7793abbe6fe\",\"name\":\"Bram\",\"logo\":{\"@id\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/#\\\/schema\\\/person\\\/image\\\/\"},\"url\":\"https:\\\/\\\/www.bramjacobse.nl\\\/wordpress\\\/?author=1\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"TDA 1540 NOS - Non Over Sampling good idea.? - Bram Jacobse","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545","og_locale":"en_US","og_type":"article","og_title":"TDA 1540 NOS - Non Over Sampling good idea.? - Bram Jacobse","og_description":"TDA 1540 NOS – Non Over Sampling good idea.? \u00a0Truncating 2 bits ? Some qoutes from internet “Absolutely no doubt that this mod has a fantastic effect on the sound, there’s no going back...","og_url":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545","og_site_name":"Bram Jacobse","article_published_time":"2022-02-01T09:35:38+00:00","article_modified_time":"2026-02-17T13:26:12+00:00","og_image":[{"width":1280,"height":800,"url":"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2022\/01\/NOS_MOD_Explan.png","type":"image\/png"}],"author":"Bram","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Bram","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#article","isPartOf":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545"},"author":{"name":"Bram","@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#\/schema\/person\/046607e546e3a7190b34f7793abbe6fe"},"headline":"TDA 1540 NOS – Non Over Sampling good idea.?","datePublished":"2022-02-01T09:35:38+00:00","dateModified":"2026-02-17T13:26:12+00:00","mainEntityOfPage":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545"},"wordCount":272,"publisher":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#\/schema\/person\/046607e546e3a7190b34f7793abbe6fe"},"image":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#primaryimage"},"thumbnailUrl":"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2022\/01\/NOS_MOD_Explan.png","keywords":["TDA 1540","TDA 1540 NOS"],"articleSection":["Measurement","NOS","TDA1540"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545","url":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545","name":"TDA 1540 NOS - Non Over Sampling good idea.? - Bram Jacobse","isPartOf":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#primaryimage"},"image":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#primaryimage"},"thumbnailUrl":"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2022\/01\/NOS_MOD_Explan.png","datePublished":"2022-02-01T09:35:38+00:00","dateModified":"2026-02-17T13:26:12+00:00","breadcrumb":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#primaryimage","url":"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2022\/01\/NOS_MOD_Explan.png","contentUrl":"https:\/\/www.bramjacobse.nl\/wordpress\/wp-content\/uploads\/2022\/01\/NOS_MOD_Explan.png","width":1280,"height":800},{"@type":"BreadcrumbList","@id":"https:\/\/www.bramjacobse.nl\/wordpress\/?p=2545#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.bramjacobse.nl\/wordpress"},{"@type":"ListItem","position":2,"name":"TDA 1540 NOS – Non Over Sampling good idea.?"}]},{"@type":"WebSite","@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#website","url":"https:\/\/www.bramjacobse.nl\/wordpress\/","name":"Bram Jacobse : Tinkering CD Players & Digital Audio","description":"Tinkering CD Players & Digital Audio","publisher":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#\/schema\/person\/046607e546e3a7190b34f7793abbe6fe"},"alternateName":"Bram Jacobse : Tinkering CD Players & Digital Audio","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.bramjacobse.nl\/wordpress\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#\/schema\/person\/046607e546e3a7190b34f7793abbe6fe","name":"Bram","logo":{"@id":"https:\/\/www.bramjacobse.nl\/wordpress\/#\/schema\/person\/image\/"},"url":"https:\/\/www.bramjacobse.nl\/wordpress\/?author=1"}]}},"_links":{"self":[{"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2545"}],"version-history":[{"count":0,"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2545\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/8587"}],"wp:attachment":[{"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bramjacobse.nl\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}