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Choosing an MCU for Audio CapturePlayback | DigiKey
https://www.digikey.com/en/articles/choosing-an-mcu-for-audio-captureplayback
You create the sample separately and just use the MCU to decode the data and output a PWM signal. 16-bit audio application Moving up to 16-bit MCUs, you might expect a significant jump in the type of audio applications that you might target. In reality, however, the difference is not as substantial as you might think.
Approaches for MCU PWM -> JAMMA audio - Page 1
https://www.eevblog.com/forum/beginners/approaches-for-mcu-pwm-gt-jamma-audio/
Approaches for MCU PWM -> JAMMA audio. « on: April 22, 2021, 09:25:37 pm ». Hello. I've got an ATMega outputting audio using a PWM pin (approximately 56kHz carrier). Currently I'm running that through a RC lowpass and into a line-in for testing. Something I'd like to do is to convert my design into something JAMMA compatible (JAMMA being a ...
Class-D audio amplifier implementation on STM32 32 …
https://www.st.com/resource/en/application_note/dm00477514-classd-audio-amplifier-implementation-on-stm32-32bit-arm-cortex-mcus-stmicroelectronics.pdf
2.2 Pulse width modulation (PWM) The PWM modulation transforms the audio input signal interface into digital signals which control the gate of the MOSFET in the power stage at a frequency of about 400 kHz for audio application. The PWM can be implemented either using analog or a digital cells.
Audio Output Options for Kinetis - NXP
https://www.nxp.com/docs/en/application-note/AN4369.pdf
audio codec IC through the I2S audio bus. The Kinetis MCU family supports the FlexTimer peripherals, providing several PWM outputs, 12-bit DAC converters, and a specialized I2S peripheral audio bus interface compatible with an external audio codec IC. As mentioned above, the audio output peripheral options for Kinetis devices are: • DAC (12-bit)
HT82V742 Audio PWM Driver Application Guidelines
https://www.holtek.com/documents/10179/116745/an0512e.pdf
CHxPRE/CRBE should be set to '1' when generating an Audio PWM Modulation application. Assuming the MCU system frequency is 48MHz, the experimental PWM bit is 10-bits (when the PWM frequency is 48kHz), the PWM1/PWM2 output is in the Normal Mode for
Wave audio player using PIC18F4550 microcontroller - …
https://simple-circuit.com/pic18f4550-audio-player-ccs-c/
If the audio is stereo (2 channels) connect the same amplification circuit and use PWM2 output pin (RC1). In this project PIC18F4550 MCU runs with 8 MHz crystal oscillator and MCLR pin function is disabled. The C code: The C code below was tested with CCS C compiler versions 5.051 and 5.070. The microcontroller runs at 48MHz (8MHz + PLL).
STR7/STR9 audio generation with PWM - st.com
https://www.st.com/resource/en/application_note/cd00119860-str7-str9-audio-generation-with-pwm-stmicroelectronics.pdf
STR7/STR9 audio generation with PWM Introduction The purpose of this application note is to provide a hardware and firmware solution to STR7 and STR9 microcontroller users for audio playback of a .WAV file. The approach is optimized in that it uses a minimal number of components external to the
audio - Playing sounds on an AVR MCU - Electrical ...
https://electronics.stackexchange.com/questions/125447/playing-sounds-on-an-avr-mcu
I used an ATtiny85 to drive a speaker through a LPF via two complementary PWM outputs (OC1B/nOC1B) upon pressing a button. Less than 0.5k of code leaves 7.5k for the audio. Larger chips leave more space for audio or the ability to use real SPI or I 2 C for storage. Volume depends on the supply voltage, but you can still get decent performance ...
Generate audio output using PIC | Microchip
https://www.microchip.com/forums/m354140.aspx
You can use PWM to generate complex audio such as speech, and even to replay music etc. Simplest PWM solution includes an RC circuit followed by an audio power amp. Better output has an antialiasing filter after the RC and before the power amp You can also use I2C or SPI DAC's, and I have seen an SPI/I2C Digital POT used for simple audio as well.
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