docs: refine manifest terminology and technical notes

Author: N4gtan

README.md

@@ -63,18 +63,22 @@ The manifest text file must be in the following format:
 ```
 chunk,type,file,null_trailing,xa_file_number,xa_channel_number,xa_null_subheader
 ```
-| Field             | Value            | Information                                                                                     |
+| Field             | Value            | Description                                                                                     |
 |-------------------|------------------|-------------------------------------------------------------------------------------------------|
-|`chunk`            |`1`-`<stride>`    |Sector chunk size to write between strides. Cannot be higher than the `<stride>` command.        |
-|`type`             |`xa` `xacd` `null`|`xa` for 2336 sector file. `xacd` for 2352 sector file. `null` for empty sectors.                |
-|`file`             |`my file.xa`      |File name or path. Can be a relative or absolute path, but without "quotes". (omitted for `null`)|
+|`chunk`            |`1`-`[stride]`    |Number of sectors per chunk within a stride. Cannot exceed the `[stride]` command value.         |
+|`type`             |`xa` `xacd` `null`|`xa` for 2336-sector file. `xacd` for 2352-sector file. `null` for empty sectors.                |
+|`file`             |`my file.xa`      |File name or path without quotation marks (can be relative or absolute). Omitted for `null`.     |
 |`null_trailing`    |`0` or more       |***OPTIONAL*** number of trailing null sectors after the end of the file. Defaults to `0`.       |
 |`xa_file_number`   |`0`-`255`         |***OPTIONAL*** subheader file number identifier. Defaults to `file` original value (RAW copy).   |
 |`xa_channel_number`|`0`-`254`         |***OPTIONAL*** subheader channel number identifier. Defaults to `file` original value (RAW copy).|
 |`xa_null_subheader`|`0xFFFFFFFF`      |***OPTIONAL*** subheader value for `null_trailing` sectors. Defaults to 0x`xa_file_number`000000.|
 
 >[!NOTE]
->The deinterleaver's `sector_beg-end` and `stride` fields are purely informative and do not affect interleaving.
+>Deinterleaver's `.csv` fields, `sector_beg-end` and `stride`, are purely informative and do not affect interleaving.
+>
+>Typical `chunk` value is 1 for audio and 7 for video streams.
+>
+>Typical `null_trailing` value is 15 or more to account for CD-ROM command latency and prevent drive overread.
 ><details>
 ><summary>Example.csv manifest for Megaman X6 BGM.XA:</summary>
 >