diff --git a/README.md b/README.md
index ffeac9a..7eb1ed6 100644
--- a/README.md
+++ b/README.md
@@ -1228,7 +1228,7 @@ The `player@v1_support` object in [`client/hello`](#client--server-clienthello)
     - `bit_depth`: integer - bit depth for this format (e.g., 16, 24); meaningful for `pcm` and `flac` only, ignored for `opus`
   - `buffer_capacity`: integer - maximum total size in bytes of outstanding audio chunks, as defined in [Player Buffer Accounting](#player-buffer-accounting)
 
-Servers MUST support the `flac` and `pcm` codecs and MAY support `opus`. Players MUST list either `flac` or `pcm` and MAY list both as entries in `supported_formats`, so that every server can serve them, and MAY list `opus` in addition. Players are not told which codecs a server supports; the server selects only among the formats it can produce, as described below.
+Servers MUST support the `flac` and `pcm` codecs at every combination of a `bit_depth` of 16 or 24, 1 or 2 `channels`, and a `sample_rate` of 44100 or 48000, and MAY support other formats, including `opus`. Players MUST list at least one `flac` or `pcm` entry in one of these combinations in `supported_formats`, so that every server can serve them, and MAY list other entries, including `opus`, in addition. Players are not told which codecs a server supports; the server selects only among the formats it can produce, as described below.
 
 **Note:** Opus is covered by third-party patents. Implementers that ship `opus` in a commercial product are responsible for any license fees that apply; the patent pool does not target open-source software distributed independently from a hardware device.
 
diff --git a/roles/player/v1.md b/roles/player/v1.md
index 384a831..99cfd7e 100644
--- a/roles/player/v1.md
+++ b/roles/player/v1.md
@@ -17,7 +17,7 @@ The `player@v1_support` object in [`client/hello`](../../messaging.md#client--se
     - `bit_depth`: integer - bit depth for this format (e.g., 16, 24); meaningful for `pcm` and `flac` only, ignored for `opus`
   - `buffer_capacity`: integer - maximum total size in bytes of outstanding audio chunks, as defined in [Player Buffer Accounting](#player-buffer-accounting)
 
-Servers MUST support the `flac` and `pcm` codecs and MAY support `opus`. Players MUST list either `flac` or `pcm` and MAY list both as entries in `supported_formats`, so that every server can serve them, and MAY list `opus` in addition. Players are not told which codecs a server supports; the server selects only among the formats it can produce, as described below.
+Servers MUST support the `flac` and `pcm` codecs at every combination of a `bit_depth` of 16 or 24, 1 or 2 `channels`, and a `sample_rate` of 44100 or 48000, and MAY support other formats, including `opus`. Players MUST list at least one `flac` or `pcm` entry in one of these combinations in `supported_formats`, so that every server can serve them, and MAY list other entries, including `opus`, in addition. Players are not told which codecs a server supports; the server selects only among the formats it can produce, as described below.
 
 **Note:** Opus is covered by third-party patents. Implementers that ship `opus` in a commercial product are responsible for any license fees that apply; the patent pool does not target open-source software distributed independently from a hardware device.