Jump to content


  • Content Count

  • Joined

  • Last visited

About yamamoto2002

  • Rank
    Freshman Member

Personal Information

  • Location

Recent Profile Visitors

3351 profile views
  1. These OS setting is used on “shared mode audio session” such as You Tube, Spotify, Skype etc. It is not used on “exclusive mode audio session”, apps (not OS) can change DAC sample format, as Mr. Rubinson said. 16bit settings: Limiter is applied when mixed signal magnitude exceeds 98.5 %. Dither is applied (16bit 2 LSB TPDF dither, even when input data is 16bit full scale signal and dither is not necessary) and 24bit PCM is truncated to 16bit. 24bit settings: Limiter is applied when mixed signal magnitude exceeds 98.5 %. Dither is not applied. So 24bit settings output signal is slightly more cleaner than 16bit. And 24bit is recommended even when playing 16bit PCM. I recommend 24bit 48000 Hz for You Tube watching, 24bit 44100 Hz for local music file playback. ---- If app uses Windows Audio Session API directly to play sound using shared mode audio, Surprisingly Window Audio Engine does not provide automatic resampling feature: resampling to shared mode sample rate should be performed by app. If app uses Media Foundation API to play shared mode audio, OS automatically resamples to target rate using Media Foundation resampler with quality=30. its conversion quality is reasonable (not best) and it is sharp roll-off linear phase. If app uses DirectSound API to play shared mode audio, OS uses slow roll-off linear phase resampler (conversion quality is lower than Media Foundation resampler, I think this is to improve throughput, reduce delay for better user experience of game sound effect). If app uses MM API to play shared mode audio, OS uses sharp roll-off linear phase resampler, and its conversion quality improvement patch is released on 2013 or 2015 ? I don't remember
  2. Dither can be applied to 1bit SDM processing pipeline and it is sometimes used. Dither worsens SNR so other methods are often used for reducing idle tone problem.
  3. Sound quality is not so different, I like Supra for cable thickness and Zonotone for its vivid color cable skin. My friend preferred Wireworld. ifi Galvanic 3.0 works properly when I'm lucky Hi-Speed 5m cable is not suitable for audio use, once in a while stuttering happens. I use generic Hi-Speed certified USB cable 2m for reference (pictured below). It always works. My other USB cables.
  4. In Japan, people uses Roland UA-4FXII for this purpose (Mix PC audio and microphone with voice alteration effects). If you are old man and you'd like to get female voice, 恋声 can be used https://youtu.be/HCJEtdOrI4Q?t=329 https://www.youtube.com/watch?v=0Pu2EwMCv9c
  5. Thank you, I understand what people said. 1bit audio SDM digital signal processing output signal is more analog-circuit friendly (it is what people emphasis) and analog parts count of SDM DAC becomes more small.
  6. IIRC the problem 2 is called `idle tones problem', which happens on normal SDM, when input signal amplitude is very low and it decreases SNR. Trellis SDM, for example, mitigates problem 2, 3 and 5. It is mathematical, digital computation method to produce 1 bit digital output. Some people say 1 bit audio is more analog than PCM. I disagree, 1bit is more digital from the very first step when Inose added a digital circuit to improve SNR of his ADC in 1962.
  7. I agree, it is needed to have “métier” to produce an art.
  8. There is more appropriate forums, such as gearslutz for this kind of question. Maybe enabling pad switch to reduce input signal magnitude by 20dB and cracking problem will be solved. Or reverting driver to version 1.0.4, and check if your hypothesis is correct or not.
  9. Onboard audio codec chips are connected to south bridge with PCIe. On X570 Aorus Xtreme motherboard, Realtek ALC 1220VB audio codec is used. This audio codec connects to ESS Sabre DAC. ALC 1220 uses "High Definition Audio" protocol. This High Definition Audio protocol for PCIe audio is equivalent to USB Audio Class protocol of USB DACs. HDMI audio also uses High Definition Audio protocol. https://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/high-definition-audio-specification.pdf Studio PCIe/PCI cards such as RME Hammerfall, Echo Layla 3G, Lynx AES16e etc has proprietary protocol.
  10. You can choose camera position, camera direction, lens focal length (field of view), focus and depth of field after taking the picture!
  11. This is some sort of Realtek ALC 1220 of Asus Z370-i motherboard. I think this is pretty good for motherboard analog audio output. RMAA result. Click image to enlarge. Measurement setup. +0dBFS 1kHz sine wave output. Frequency is accurate. Output voltage is 2.2V RMS. Analog reconstruction filter is brick-wall linear-phase. It seems high frequency noise is well suppressed.
  12. I think this is the future of photography... And it is Leica!
  13. I'd like to answer to this question. Modern music is tuned A=440Hz and fundamental frequency of lowest keys of piano is showed in the following pic. How to determine lowest pitch tone frequency Use WaveGene or your favorite tone generator to generate sinusoidal continuous tone, say 55.0Hz (A1, ra), hear it and understand what A1 sounds like. Listen to music, lowest sound instrument, and determine lowest pitch Examples Lowest freq = 25.96Hz, As0 https://www.youtube.com/watch?v=p0DlTQ-bBMM C1 As0 B0 on 1min 46sec Lowest freq = 30.87Hz, H0 https://www.youtube.com/watch?v=OXq-JP8w5H4 Fis1 Cis1 H0 Cis1, lowest is H0 = 30.87Hz https://www.youtube.com/watch?v=aZOGcaU7q1A Lowest freq = 32.70Hz, C1 https://www.youtube.com/watch?v=svpw1AlIY1o https://www.youtube.com/watch?v=SB8-YY2DyHI https://www.youtube.com/watch?v=ooHII67__Sg?t=33s G1 D1 E1 C1 https://www.youtube.com/watch?v=B9Yc7BMQPH0 A1 G1 D1 C1 https://www.youtube.com/watch?v=MCcekcmyEQs F Des Es C https://www.youtube.com/watch?v=nQcUJdncTeg F C Des Es Lowest freq = 34.65Hz, Cis1 or Des1 https://www.youtube.com/watch?v=y7d9VLRO3vc F Es As Des https://www.youtube.com/watch?v=ONdlP-nxo3g Cis Lowest freq = 36.71Hz, D https://www.youtube.com/watch?v=IFM6kcRNcIs D Fis https://www.youtube.com/watch?v=1MHA2hBsGwc
  14. Nowadays digital image sensor performance surpassed emulsion film in every aspect. Last stronghold of emulsion film was medical x-ray photography but it is now replaced with digital sensor and radiation dose is reduced by increased sensor sensitivity.
  • Create New...