Talk:Super Audio CD

message: So the new edit says that the 2007 study "downsampled to CD quality  in some listener populations". It's unclear -- does this mean that some populations couldn't hear the difference, some populations got a downsample and others didn't...or what? If everyone was comparing downsampled audio to original CD quality audio....how the hell is this study worthwhile, at all? Like, I can't imagine any actual legit scientific stufy would be that dumb, so I'm assuming it's just badly worded. ♫ Melodia Chaconne ♫ (talk) 06:15, 3 February 2020 (UTC)
replies: text: See page 776 of the 2007 AES paper. Various SACD and DVD-Audio discs were placed in a randomized double blind loop. I've removed this from the History section.--♦IanMacM♦ (talk to me) 07:00, 3 February 2020 (UTC)
thread_title: Hold on here...

message: ——  ¡for bats!  — Preceding unsigned comment added by 2601:643:C002:E3E0:1C6A:9E75:5833:6D1B (talk) 09:32, 6 November 2021 (UTC)
replies: text: No it isn't. Bats can hear up to 100kHz so they would probably be disappointed by the 50kHz top end of SACD.--♦IanMacM♦ (talk to me) 10:14, 6 November 2021 (UTC)
thread_title:  This is the perfect audio-format  —— 

message: This is clearly wrong. A standard CD holds 74 minutes worth of 16-bit, stereo, 44.1 kHz audio. If you do the math, 74 * 60 * 16 / 8 * 2 * 44,100 equals 783,216,000 bytes ≈ 783 MB or 747 MiB. The cited source says "700 MB" in the context of "CD, CD-R, CD-RW" which seems to refer to data mode (mode-1) which only uses 2048 usable data bytes for every frame of 1/75 second or 2352 audio bytes or 2336 mode-2 bytes. Since this page is about the Audio CD we should state the audio capacity, not the data capacity. --Zac67 (talk) 22:12, 30 October 2023 (UTC)
replies: text: According to Compact disc, "Standard CDs have a diameter of  and are designed to hold up to 74 minutes of uncompressed stereo digital audio or about 650 MiB of data. Capacity is routinely extended to 80 minutes and 700 MiB by arranging data more closely on the same-sized disc".--♦IanMacM♦ (talk to me) 08:30, 31 October 2023 (UTC)
replies: text: "or 650 MB of data" refers to mode-1 data usage. Audio CDs use the full raw capacity 2352 bytes for each 2048-byte sector in mode-1 – see CD-ROM#CD-ROM format: "a CD-ROM sector contains 2,352 bytes of user data". --Zac67 (talk) 11:25, 31 October 2023 (UTC)
thread_title:  "700 MB" for Audio CD 

message: You can call it unneeded, but without a number most people are going to need to go look it up elsewhere. I know I did. That is why I improved the article afterwards.  — Preceding unsigned comment added by 104.246.76.228 (talk) 18:06, 8 March 2024 (UTC)
thread_title:  Which DSD 

message: Re this edit: different sources give the dynamic range of human hearing as 120-140dB. However, it has to be said that 140dB is very loud indeed and would be capable of causing pain and hearing loss very quickly. ♦IanMacM♦ (talk to me) 16:15, 8 May 2024 (UTC)
replies: text: I imagine that workplace safety guidelines would use a different maximum than listening for pleasure. Levels above the pain threshold are not relevant for a consumer listening to recorded media. Binksternet (talk) 17:02, 8 May 2024 (UTC)

text: Plenty of sources describe 120 dB of dynamic range, for instance the textbooks Introduction to Circuit Analysis and Design by Springer Science & Business Media, and Foundations in Sound Design for Linear Media: A Multidisciplinary Approach by Routledge. The context for these is listening to music and speech, not workplace safety. Binksternet (talk) 17:19, 8 May 2024 (UTC)

text: OP, your comment seems to conflate dynamic range caputred in a recording with absolute intensity of ambient sound.  Regardless of the dynamic range - decibel differential - of a recording, it can be played back at any level of amplification from near-silent to deafening. SPECIFICO talk 19:25, 8 May 2024 (UTC)
thread_title:  Dynamic range of human hearing