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| 1 | What.CD - Interview Notes v0.2 | |
| 2 | ||
| 3 | ## Allowed Lossless | |
| 4 | - FLAC | |
| 5 | ||
| 6 | ## Allowed Lossy | |
| 7 | - MP3 (Minimum is MP3 192kbps CBR) | |
| 8 | - AAC (Can be trumped by any MP3 unless iTunes + extra purchased) | |
| 9 | - AC3 (DVDs) | |
| 10 | - DTS (DVDs) | |
| 11 | ||
| 12 | ||
| 13 | ## MP3 | |
| 14 | Constant Bitrate (CBR) | |
| 15 | - The same bitrate entire song, even silence given same bits/ps (no higher / no lower) | |
| 16 | ||
| 17 | Varaible Bitrate (VBR) | |
| 18 | - Bitrate varies entire song, depending on complexity of certain sound. Different presets. | |
| 19 | ->V0 = ~245kbps (Target) - (Can peak higher than 256 CBR) [Allowed] | |
| 20 | ->V1 = ~225kbps (Target) | |
| 21 | ->V2 = ~190kbps (Target) - (Can peak higher than 192 CBR) [Allowed] | |
| 22 | ->V3 = ~175kbps (Target) | |
| 23 | ->V4 = ~165kbps (Target) | |
| 24 | ->V5 = ~130kbps (Target) | |
| 25 | ->V6 = ~115kbps (Target) | |
| 26 | ||
| 27 | Average Bitrate (ABR) | |
| 28 | - The bitrate will vary, but is guaranteed to AVERAGE at the preset | |
| 29 | -> Not recommended on what.cd (not best at anything) | |
| 30 | ||
| 31 | ||
| 32 | ## Audio Formats | |
| 33 | Bitrates | |
| 34 | - Number of bits transferred in an amount of time. Higher bitrate | |
| 35 | equals higher quality. (Ex. MP3 CBR 320 transfers 320 bits/ps. | |
| 36 | ||
| 37 | Lossy | |
| 38 | - Cuts actual frequencies out of the file for compression (looses quality) | |
| 39 | ||
| 40 | Uncompressed Lossless vs. Compressed Lossless | |
| 41 | - Uncompressed lossless doesn't attempt any compression, silence is | |
| 42 | kept in tact. Compressed lossless gives silence almost no bits/ps | |
| 43 | and compresses the audio (with no loss of quality though.) | |
| 44 | ||
| 45 | ||
| 46 | ## Transcodes | |
| 47 | - Conversion from one format to another. Sometimes said in negative | |
| 48 | context, referencing bad transcodes. | |
| 49 | ||
| 50 | Bad Transcodes | |
| 51 | - NEVER convert LOSSY to LOSSLESS! | |
| 52 | - NEVER convert LOSSY to LOSSY! (Only looses more quality) | |
| 53 | - Don't convert same bitrate lossy to same bitrate lossy | |
| 54 | ||
| 55 | Good Transcodes | |
| 56 | - Compressed lossless --> Uncompressed lossless | |
| 57 | - Compressed lossless --> Compressed lossless | |
| 58 | - Compressed lossless --> Lossy | |
| 59 | - Uncompressed lossless --> Compressed lossless | |
| 60 | - Uncompressed lossless --> Lossy | |
| 61 | ||
| 62 | ||
| 63 | ## Torrenting | |
| 64 | - Leeching data from peers, then seeding back what you have | |
| 65 | - Partial seeders = didn't download entire torrent (not a good idea to get torrent with many partial seeders if you want to boost your ratio) | |
| 66 | - Ratio = {Shared}.{Downloaded} (If you download 100MB and up 200MB, ratio is 2.0)
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| 67 | ||
| 68 | ||
| 69 | # General Knowledge / Facts | |
| 70 | - WAV (PCM) has a higher bitrate than FLAC | |
| 71 | - MP3 VO (VBR) can have a higher bitrate than MP3 256kbps (CBR) | |
| 72 | - MP3 V2 cannot be trumped when uploaded to What.CD | |
| 73 | - Again... LOSSY TO LOSSY? NEVER! LOSSY TO LOSSLESS? NEVER? | |
| 74 | - LAME = Used to encode MP3s | |
| 75 | - Use EAC to rip CDs | |
| 76 | - Cue files are tables / catlogs to burn identical CDs | |
| 77 | - Log files document rips for errors | |
| 78 | ||
| 79 | # Starting the Interview | |
| 80 | - The interview takes place in an IRC channel. | |
| 81 | -> IRC Server: irc.what-network.net | |
| 82 | -> Port: 6667 (+6697 for SSL) | |
| 83 | - https://www.whatinterviewprep.com/starting-the-interview/ | |
| 84 | - Waiting to get interviewed is the hardest part. Can take up to 5 hours just to start. |
