InsaneFirebat

TASBOT DSP Sample Rate Survey

Feb 26th, 2025
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  1. // Form
  2. // https://nextcloud.tas.bot/index.php/apps/forms/s/TJDiEwP6J7HFfYbPRw4A7dHN
  3.  
  4. // Test ROM
  5. // https://nextcloud.tas.bot/index.php/s/NBZNsCNPc5JoQdC
  6.  
  7. // North American SNES
  8. // UN 10769777
  9. // SNS-001
  10. // © 1991 Nintendo
  11.  
  12.  
  13.  
  14. // first recording
  15.  
  16. SNES PPU: 60Hz
  17. Assumed CPU Clock: 21.477MHz
  18.  
  19. Raw reading: 208db
  20.  
  21. Meaning: 383861 µs
  22. slowest: 383899 µs
  23. Fastest: 383858 µs
  24. S-SMP clock: 1027356 Hz
  25. relative: +03277 ppm
  26. Slowest: 1027256 Hz
  27. Fastest: 1027379 Hz
  28.  
  29. DSP sample rate: 32102 Hz
  30.  
  31.  
  32.  
  33. // 20 minutes later
  34.  
  35. Raw reading: 208ba
  36.  
  37. Meaning: 383775 µs
  38. Slowest: 383899 µs
  39. Fastest: 383772 µs
  40.  
  41. S-SMP clock: 1027595
  42. relative: +03502 ppm
  43. Slowest: 1027256 Hz
  44. Fastest: 1027603 Hz
  45.  
  46. DSP sample rate: 32112 Hz
  47.  
  48.  
  49.  
  50. // stable in 30-35m
  51.  
  52. Raw reading: 208b6
  53.  
  54. Meaning: 383761 µs
  55. Slowest: 383899 µs
  56. Fastest: 383761 µs
  57.  
  58. S-SMP clock: 1027626 Hz
  59. relative: +03541 ppm
  60. Slowest: 1027256 Hz
  61. Fastest: 1027634 Hz
  62.  
  63. DSP sample rate: 32113 Hz
  64.  
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