{"id":3889,"date":"2026-05-24T09:01:51","date_gmt":"2026-05-24T11:01:51","guid":{"rendered":"https:\/\/amxprojects.com\/?p=3889"},"modified":"2026-05-24T09:01:51","modified_gmt":"2026-05-24T11:01:51","slug":"melhorando-o-som-dos-hotbits","status":"publish","type":"post","link":"https:\/\/amxprojects.com\/?p=3889","title":{"rendered":"Melhorando o som dos Hotbits"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Desde quando os Hotbits eram &#8220;mainstream&#8221;, sempre notava que o som do meu Hotbit era bastante alto na TV, considerava isso bom na \u00e9poca (rs). Com o retorno para o mundo da retrocomputa\u00e7\u00e3o e utilizando os mais diversos cartuchos de som para MSX, principalmente aqueles com SCC, comecei a notar que o n\u00edvel do PSG \u00e9 muito alto em rela\u00e7\u00e3o ao SCC que chegava pelo cartucho. Isso sempre me incomodou, mas sempre deixava de lado e pensava que era &#8220;caracter\u00edstica da m\u00e1quina&#8221;. Bom, nos \u00faltimos dias, estive acertando tamb\u00e9m um cartucho FM-Stereo da CIEL, que havia adquirido recentemente, e para nenhuma surpresa, o som dele estava particularmente estridente nos Hotbits que tenho aqui. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tendo isso em vista, resolvi ent\u00e3o verificar essa quest\u00e3o para melhorar o som nos Hotbits e equilibrar o n\u00edvel do volume em rela\u00e7\u00e3o aos cartuchos que tenho aqui dispon\u00edveis. Analisando o esquema do micro, comecei o trabalho para acertar os resistores que vinham do PSG e tamb\u00e9m da linha do cartucho, que trazia o som SCC e FM. Ap\u00f3s v\u00e1rios testes, cheguei a solu\u00e7\u00e3o abaixo.<\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a93c69439670&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a93c69439670\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"649\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/Mod_Som_Hotbit-1024x649.png\" alt=\"\" class=\"wp-image-3890\" srcset=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/Mod_Som_Hotbit-1024x649.png 1024w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/Mod_Som_Hotbit-300x190.png 300w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/Mod_Som_Hotbit-768x487.png 768w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/Mod_Som_Hotbit.png 1219w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Primeiramente o sinal vindo do cartucho estava com o n\u00edvel bem alto, e o resistor R8, que originalmente \u00e9 de 15K, foi trocado por um de 110K. Assim ficou perfeito tanto para o FM quanto para o SCC (com cartucho SCC original ou FPGA). O sinal vindo do PSG estava com n\u00edvel muito alto tamb\u00e9m, assim foi trocado o resistor R16 de 33K para um de 68K. <\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a93c6943a168&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a93c6943a168\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130400-1024x768.jpg\" alt=\"\" class=\"wp-image-3892\" srcset=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130400-1024x768.jpg 1024w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130400-300x225.jpg 300w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130400-768x576.jpg 768w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130400-1536x1152.jpg 1536w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130400-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Trocar R8 por um resistor de 110K<\/figcaption><\/figure>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a93c6943aae1&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a93c6943aae1\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130349-1024x768.jpg\" alt=\"\" class=\"wp-image-3893\" srcset=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130349-1024x768.jpg 1024w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130349-300x225.jpg 300w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130349-768x576.jpg 768w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130349-1536x1152.jpg 1536w, https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/IMG_20260523_130349-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><figcaption class=\"wp-element-caption\">Trocar R16 por um resistor de 68K.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Com isso o som ficou equilibrado no PSG, SCC e FM. Abaixo o resultado final.<\/p>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"720\" style=\"aspect-ratio: 1280 \/ 720;\" width=\"1280\" controls src=\"https:\/\/amxprojects.com\/\/wp-content\/upload\/2026\/05\/VID_20260523_131255.mp4\"><\/video><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Abs,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Daniel<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Desde quando os Hotbits eram &#8220;mainstream&#8221;, sempre notava que o som do meu Hotbit era bastante alto na TV, considerava isso bom na \u00e9poca (rs). Com o retorno para o mundo da retrocomputa\u00e7\u00e3o e utilizando os mais diversos cartuchos de &hellip; <a href=\"https:\/\/amxprojects.com\/?p=3889\">Continuar a ler <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[346,345,343,344],"class_list":["post-3889","post","type-post","status-publish","format-standard","hentry","category-msx","tag-fm","tag-opll","tag-psg","tag-scc"],"_links":{"self":[{"href":"https:\/\/amxprojects.com\/index.php?rest_route=\/wp\/v2\/posts\/3889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/amxprojects.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/amxprojects.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/amxprojects.com\/index.php?rest_route=\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/amxprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3889"}],"version-history":[{"count":2,"href":"https:\/\/amxprojects.com\/index.php?rest_route=\/wp\/v2\/posts\/3889\/revisions"}],"predecessor-version":[{"id":3895,"href":"https:\/\/amxprojects.com\/index.php?rest_route=\/wp\/v2\/posts\/3889\/revisions\/3895"}],"wp:attachment":[{"href":"https:\/\/amxprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/amxprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/amxprojects.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}