Résumé :
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"Using Teensy 4.1 Using the same store-bought speaker system for both TV audio and playing music means dealing with unwelcome trade-offs. With that in mind, in this project article Brian taps a Teensy 4.1 to build a home-brew digital amplifier for his TV that's optimized for both TV watching and playing music. Topics Discussed How to use Teensy 4.1 to build a home-brew digital amplifier optimized for both TV watching and playing music.How TV digital audio formats workHow to make use of the Teensy 4.1 moduleHow to make use of the Teensy Audio System Design ToolHow to craft your audio signal flowHow to use a 6-band graphic EQHow to develop the circuitry Tech Used Teensy 4.1 board from PJRCTeensy Audio library from PJRCEverlight's PLR135/T TOSLINK receiver moduleAudio System Design Tool from PJRCPrinceton Technology’s PT8211 Stereo DACNXP Semiconductors’ MIMXRT1062 MCUTSOP38238 IR receiver module from Digi-KeyVishay TSOP38238 remote-control receiver OKI-78SR-5/1.5 from Murata Power SolutionsMaxim Integrated’s MAX98357 I2S amplifier ICWalfront's Bluetooth Amplifier Board Modern, flat-screen TVs have slim bezels and are very thin in depth. As a result, most of them have little space for a decent loudspeaker, so they don’t provide good sound quality unless you augment them with something external. Today that generally means adding a soundbar of some sort, whereas when I purchased my first flat screen TV, a complete “Home Theater” solution was what was being promoted. The marketing influenced me; I purchased a high-quality home theater receiver and five speakers to match the receiver’s 5.1 sound capability." (Extrait de Circuit Cellar n°372)
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