{"id":17424,"date":"2023-07-30T13:02:10","date_gmt":"2023-07-30T17:02:10","guid":{"rendered":"https:\/\/scruss.com\/blog\/?p=17424"},"modified":"2023-07-30T13:02:10","modified_gmt":"2023-07-30T17:02:10","slug":"syn6288-tts-board-from-aliexpress","status":"publish","type":"post","link":"https:\/\/scruss.com\/blog\/2023\/07\/30\/syn6288-tts-board-from-aliexpress\/","title":{"rendered":"SYN6288 TTS board from AliExpress"},"content":{"rendered":"\n

After remarkable success with the SYN-6988 TTS module<\/a>, then somewhat less success with the SYN-6658 and other modules<\/a>, I didn’t hold out much hope for the YuTone SYN-6288, which – while boasting a load of background tunes that could play over speech – can only convert Chinese text to speech<\/p>\n\n\n\n

\"small
as bought from quason official store: SYN6288 speech synthesis module<\/a><\/figcaption><\/figure>\n\n\n\n

The wiring is similar to the SYN-6988: a serial UART connection at 9600 baud, plus a Busy (BY) line to signal when the chip is busy. The serial protocol is slightly more complicated, as the SYN-6288 requires a checksum byte at the end.<\/p>\n\n\n\n

As I’m not interested in the text-to-speech output itself, here’s a MicroPython script to play all of the sounds:<\/p>\n\n\n

\n# very crude MicroPython demo of SYN6288 TTS chip\n# scruss, 2023-07\nimport machine\nimport time\n\n### setup device\nser = machine.UART(\n    0, baudrate=9600, bits=8, parity=None, stop=1\n)  # tx=Pin(0), rx=Pin(1)\n\nbusyPin = machine.Pin(2, machine.Pin.IN, machine.Pin.PULL_UP)\n\n\ndef sendspeak(u2, data, busy):\n    # modified from https:\/\/github.com\/TPYBoard\/TPYBoard_lib\/\n    # u2 = UART(uart, baud)\n    eec = 0\n    buf = [0xFD, 0x00, 0, 0x01, 0x01]\n    # buf = [0xFD, 0x00, 0, 0x01, 0x79]  # plays with bg music 15\n    buf[2] = len(data) + 3\n    buf += list(bytearray(data, "utf-8"))\n    for i in range(len(buf)):\n        eec ^= int(buf[i])\n    buf.append(eec)\n    u2.write(bytearray(buf))\n    while busy.value() != True:\n        # wait for busy line to go high\n        time.sleep_ms(5)\n    while busy.value() == True:\n        # wait for it to finish\n        time.sleep_ms(5)\n\n\nfor s in "abcdefghijklmnopqrstuvwxy":\n    playstr = "[v10][x1]sound" + s\n    print(playstr)\n    sendspeak(ser, playstr, busyPin)\n    time.sleep(2)\n\nfor s in "abcdefgh":\n    playstr = "[v10][x1]msg" + s\n    print(playstr)\n    sendspeak(ser, playstr, busyPin)\n    time.sleep(2)\n\nfor s in "abcdefghijklmno":\n    playstr = "[v10][x1]ring" + s\n    print(playstr)\n    sendspeak(ser, playstr, busyPin)\n    time.sleep(2)\n<\/pre><\/div>\n\n\n
Each sound starts and stops with a very loud click, and the sound quality is not great. I couldn’t get a good recording of the sounds (some of which of which are over a minute long) as the only way I could get reliable audio output was through tiny headphones. Any recording came out hopelessly distorted:<\/p>\n\n\n\n
I’m not too disappointed that this didn’t work well. I now know that the SYN-6988 is the good one to get. It also looks like I may never get to try the XFS5152CE<\/a> speech synthesizer board: AliExpress has cancelled my shipment for no reason. It’s supposed to have some English TTS function, even if quite limited.<\/p>\n\n\n\n
Here’s the auto-translated SYN-6288 manual, if you do end up finding a use for the thing<\/p>\n\n\n\n