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Audio via Arduino 16-bit PWM | Sand, software and sound
http://sandsoftwaresound.net/audio-via-arduino-16-bit-pwm/
TIMER1: 8-bit and 16-bit PWM, pins D9 and D10. TIMER2: 8-bit PWM, pins D3 and D11, tone () Timers 0 and 2 are used by the Arduino delay () and tone () functions, respectively. So, you cannot use these functions and expect to generate PWM at the same time. All appears lost for audio until one discovers TIMER1’s 16-bit PWM mode.
16-bit Audio PWM by Dual 8-bit PWM with Auto …
https://www.deeptronic.com/electronic-circuit-design/high-precision-16-bit-audio-output-using-cascaded-8-bit-pwm-with-auto-calibration/
16-bit Audio PWM Calibration. The calibration procedure should be implemented to adjust the auto reload/reset value to lengthen the PWM period. Consequently, the transition of low-PWM from 0x00 to 0xFF would produce the same increase by smallest increment of the high-PWM.
Arduino & Advanced 16-bit PWM - Codrey Electronics
https://www.codrey.com/arduino-projects/arduino-advanced-16-bit-pwm/
Timer1 is 16 bit and not used by default, timer2 is another 8-bit timer like timer0 but not used by default. For Arduino Uno, the system clock is 16MHz so that the timers are clocking at 250kHz by default (16MHz/64). Phase correct 8-bit PWM mode takes 510 clocks to cycle and fast 8-bit PWM mode takes 256. This means a frequency of 490Hz for ...
16 bit AM transmitter possible? - Project Guidance ...
https://forum.arduino.cc/t/16-bit-am-transmitter-possible/956738
// Timer1 PWM 16 bit, Phase Correct mode, frequency at each pin 31.25kHz - output D9 & D10 are added together for 8 bit + 8 bit = 16 bit audio resolution. Sampling frequency is 64KHz (adc clk/ 14 cycles) which gives an audio bandwidth of 20Hz to 20KHz ''' #define PWM_FREQ 0x00FF // pwm frequency count - 255 or 11111111 // sets resolution for ...
ECE 4760 16-bit Stereo Wave Player
https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2014/wz233/ECE%204760%20Final%20Report%20(HTML)/ECE%204760%20Stereo%20Player.html
On the contrary, the format of WAVE file is easier: it is composed by a simple file header followed by RAW audio data which can be directly output to PWM channels (16-bit audio data needs simple subtraction operation). Another advantage to use WAVE file is that it is lossless!
Playing MP3s using PWM audio — PIC32 for the hobbyist …
http://www.aidanmocke.com/blog/2018/11/20/mp3-pwm/
Things to be aware of when playing MP3s back via PWM Converting signed 16-bit numbers to unsigned 11-bit. Most MP3s I've seen are encoded at 44.1kHz or 48kHz signed 16-bit stereo. Let's think about what that means in terms of playback. The frequency is not a problem, we already did 44.1kHz last time. The real problem is the 16-bit signed audio.
16-bit PWM, USART, SPI and 16-bit Timer/Counter ATmegaS128
https://ww1.microchip.com/downloads/en/DeviceDoc/atmegas128_ds.pdf
Rad-Tol 8-bit AVR Microcontroller, 3.3V, 8 MHz with 128 KB Flash, 4 KB EEPROM, 4 KB SRAM, 10-bit ADC, TWI, RTC, 16-bit PWM, USART, SPI and 16-bit Timer/Counter Introduction The ATmegaS128 is a low-power CMOS 8-bit microcontroller …
PIC16F1769 + PWM16bit + WAV AUDIO | Microchip
https://www.microchip.com/forums/m989941.aspx
PIC16F1769 + PWM16bit + WAV AUDIO I plan to play an audio as follows: 1. To Receive by USART a wav file previously set to 44100Hz, 1 channel, 16bit. 2. Set PWM to 44100Hz. Duty cycle varies from 0000 to FFFF for Higher quality 3. Output pin enter to a filter then to speaker. My problem is Duty varies only from 0x0000 to 0x02D3.
ESP32 16bit PWM? - reddit
https://www.reddit.com/r/esp32/comments/ee3rtm/esp32_16bit_pwm/
esp32 has 16bit PWM. On Datasheet 4.1.16 LED PWM: "Each channel can select a 20-bit timer with configurable counting range, while its accuracy of duty can …
Audio using PWM, what is the principle behind it ...
https://electronics.stackexchange.com/questions/239442/audio-using-pwm-what-is-the-principle-behind-it
A DAC that uses PWM techniques is no different. In any one cycle of the PWM waveform, the ratio of mark-to-space must accurately "represent" the instantaneous analogue signal and a single PWM cycle must be shorter in time than half the period of the highest audio signal: -. The above is a simple representation of 3 DC levels using PWM.
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