diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index acfa0ff3..0fdcffdc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-latest, windows-latest, ubuntu-latest]
-        toolchain: ["1.87"]
+        toolchain: ["1.89"]
         include:
           - os: macos-latest
             MACOS: true
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 167f87cc..48f72cd7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- Added Opus support via `symphonia-adapter-libopus`.
+- Third-party Symphonia codecs can be registered with `DecoderBuilder::with_decoder`.
+
 ## Version [0.22.1] (2026-02-22)
 
 ### Fixed
diff --git a/Cargo.lock b/Cargo.lock
index 677e0090..eb7d4ea9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -124,6 +124,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aebf35691d1bfb0ac386a69bac2fde4dd276fb618cf8bf4f5318fe285e821bb2"
 dependencies = [
  "find-msvc-tools",
+ "jobserver",
+ "libc",
  "shlex",
 ]
 
@@ -182,6 +184,15 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4bfbf56724aa9eca8afa4fcfadeb479e722935bb2a0900c2d37e0cc477af0688"
 
+[[package]]
+name = "cmake"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75443c44cd6b379beb8c5b45d85d0773baf31cce901fe7bb252f4eff3008ef7d"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "combine"
 version = "4.6.7"
@@ -431,6 +442,24 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "af9673d8203fcb076b19dfd17e38b3d4ae9f44959416ea532ce72415a6020365"
 
+[[package]]
+name = "fdk-aac"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7bb67e142688083cb9afb63f2424203fc98c4e7afb494bf912b60b55513b177e"
+dependencies = [
+ "fdk-aac-sys",
+]
+
+[[package]]
+name = "fdk-aac-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24516d2611506d5cb1833555adc75f6baf9fe2706b9c13e6fc33a6b22c51ca83"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -505,6 +534,18 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasip2",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.4.1"
@@ -612,11 +653,21 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eaf4bc02d17cbdd7ff4c7438cafcdf7fb9a4613313ad11b4f8fefe7d3fa0130"
 
+[[package]]
+name = "jobserver"
+version = "0.1.34"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9afb3de4395d6b3e67a780b6de64b51c978ecf11cb9a462c66be7d4ca9039d33"
+dependencies = [
+ "getrandom 0.3.4",
+ "libc",
+]
+
 [[package]]
 name = "js-sys"
-version = "0.3.85"
+version = "0.3.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c942ebf8e95485ca0d52d97da7c5a2c387d0e7f0ba4c35e93bfcaee045955b3"
+checksum = "93f0862381daaec758576dcc22eb7bbf4d7efd67328553f3b45a412a51a3fb21"
 dependencies = [
  "once_cell",
  "wasm-bindgen",
@@ -955,6 +1006,16 @@ version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
+[[package]]
+name = "opusic-sys"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f43c183739dc81651487e7c9f3e4330fe4a3fd26c0fa961c788ce5fb21fa75b"
+dependencies = [
+ "cmake",
+ "libc",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.5"
@@ -1192,6 +1253,8 @@ dependencies = [
  "rstest_reuse",
  "rtrb",
  "symphonia",
+ "symphonia-adapter-fdk-aac",
+ "symphonia-adapter-libopus",
  "thiserror 2.0.18",
  "tracing",
 ]
@@ -1436,6 +1499,28 @@ dependencies = [
  "symphonia-metadata",
 ]
 
+[[package]]
+name = "symphonia-adapter-fdk-aac"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82194865c2b438a75a2b40a12495d5d1a6c3cb2bb36671f9921ab44756ee77d2"
+dependencies = [
+ "fdk-aac",
+ "log",
+ "symphonia-core",
+]
+
+[[package]]
+name = "symphonia-adapter-libopus"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bb56e67fc0f362731bc7a2920562ebb5668281b202444a0d274ddd3b5af61e6"
+dependencies = [
+ "log",
+ "opusic-sys",
+ "symphonia-core",
+]
+
 [[package]]
 name = "symphonia-bundle-flac"
 version = "0.5.5"
@@ -1825,9 +1910,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.108"
+version = "0.2.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64024a30ec1e37399cf85a7ffefebdb72205ca1c972291c51512360d90bd8566"
+checksum = "1de241cdc66a9d91bd84f097039eb140cdc6eec47e0cdbaf9d932a1dd6c35866"
 dependencies = [
  "cfg-if",
  "once_cell",
@@ -1838,9 +1923,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.58"
+version = "0.4.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70a6e77fd0ae8029c9ea0063f87c46fde723e7d887703d74ad2616d792e51e6f"
+checksum = "a42e96ea38f49b191e08a1bab66c7ffdba24b06f9995b39a9dd60222e5b6f1da"
 dependencies = [
  "cfg-if",
  "futures-util",
@@ -1852,9 +1937,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.108"
+version = "0.2.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "008b239d9c740232e71bd39e8ef6429d27097518b6b30bdf9086833bd5b6d608"
+checksum = "e12fdf6649048f2e3de6d7d5ff3ced779cdedee0e0baffd7dff5cdfa3abc8a52"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -1862,9 +1947,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.108"
+version = "0.2.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5256bae2d58f54820e6490f9839c49780dff84c65aeab9e772f15d5f0e913a55"
+checksum = "0e63d1795c565ac3462334c1e396fd46dbf481c40f51f5072c310717bc4fb309"
 dependencies = [
  "bumpalo",
  "proc-macro2",
@@ -1875,9 +1960,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.108"
+version = "0.2.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f01b580c9ac74c8d8f0c0e4afb04eeef2acf145458e52c03845ee9cd23e3d12"
+checksum = "e9f9cdac23a5ce71f6bf9f8824898a501e511892791ea2a0c6b8568c68b9cb53"
 dependencies = [
  "unicode-ident",
 ]
@@ -1918,9 +2003,9 @@ dependencies = [
 
 [[package]]
 name = "web-sys"
-version = "0.3.85"
+version = "0.3.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "312e32e551d92129218ea9a2452120f4aabc03529ef03e4d0d82fb2780608598"
+checksum = "f2c7c5718134e770ee62af3b6b4a84518ec10101aad610c024b64d6ff29bb1ff"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
diff --git a/Cargo.toml b/Cargo.toml
index 0f7ff62b..13da284c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ repository = "https://github.com/RustAudio/rodio"
 documentation = "https://docs.rs/rodio"
 exclude = ["assets/**", "tests/**"]
 edition = "2021"
-rust-version = "1.87"
+rust-version = "1.89"
 
 [features]
 # Default feature set provides audio playback and common format support
@@ -50,6 +50,9 @@ noise = ["rand", "rand_distr"]
 # Enable WebAssembly support for web browsers
 wasm-bindgen = ["cpal/wasm-bindgen"]
 
+# Base symphonia feature (doesn't enable any codecs)
+symphonia = ["dep:symphonia"]
+
 # To decode an audio source with Rodio, you need to enable the appropriate features for *both* the
 # demuxer and the decoder.
 #
@@ -96,6 +99,9 @@ symphonia-wav = ["symphonia/wav"]
 # Enable SIMD optimisations for Symphonia
 symphonia-simd = ["symphonia/opt-simd"]
 
+# libopus adapter for Symphonia
+symphonia-libopus = ["symphonia", "dep:symphonia-adapter-libopus"]
+
 # Alternative decoders and demuxers
 claxon = ["dep:claxon"]         # FLAC
 hound = ["dep:hound"]           # WAV
@@ -126,6 +132,8 @@ atomic_float = { version = "1.1.0", optional = true }
 rtrb = { version = "0.3.2", optional = true }
 num-rational = "0.4.2"
 
+symphonia-adapter-libopus = { version = "0.2", optional = true }
+
 [dev-dependencies]
 quickcheck = "1"
 rstest = "0.26"
@@ -133,6 +141,7 @@ rstest_reuse = "0.7"
 approx = "0.5.1"
 divan = "0.1.14"
 inquire = "0.9.3"
+symphonia-adapter-fdk-aac = "0.1"
 
 [[bench]]
 name = "effects"
@@ -230,6 +239,10 @@ required-features = ["playback", "vorbis"]
 name = "music_wav"
 required-features = ["playback", "wav"]
 
+[[example]]
+name = "music_opus"
+required-features = ["playback", "symphonia-libopus"]
+
 [[example]]
 name = "noise_generator"
 required-features = ["playback", "noise"]
@@ -253,3 +266,7 @@ required-features = ["playback", "vorbis"]
 [[example]]
 name = "stereo"
 required-features = ["playback", "vorbis"]
+
+[[example]]
+name = "third_party_codec"
+required-features = ["playback", "symphonia", "symphonia-isomp4"]
diff --git a/assets/music.opus b/assets/music.opus
new file mode 100644
index 00000000..4c8e8224
Binary files /dev/null and b/assets/music.opus differ
diff --git a/examples/music_opus.rs b/examples/music_opus.rs
new file mode 100644
index 00000000..f0f4d725
--- /dev/null
+++ b/examples/music_opus.rs
@@ -0,0 +1,13 @@
+use std::error::Error;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let stream_handle = rodio::DeviceSinkBuilder::open_default_sink()?;
+    let player = rodio::Player::connect_new(stream_handle.mixer());
+
+    let file = std::fs::File::open("assets/music.opus")?;
+    player.append(rodio::Decoder::try_from(file)?);
+
+    player.sleep_until_end();
+
+    Ok(())
+}
diff --git a/examples/third_party_codec.rs b/examples/third_party_codec.rs
new file mode 100644
index 00000000..4ed7f6ea
--- /dev/null
+++ b/examples/third_party_codec.rs
@@ -0,0 +1,23 @@
+use rodio::decoder::DecoderBuilder;
+use std::error::Error;
+use symphonia_adapter_fdk_aac::AacDecoder;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let stream_handle = rodio::DeviceSinkBuilder::open_default_sink()?;
+    let sink = rodio::Player::connect_new(stream_handle.mixer());
+
+    let file = std::fs::File::open("assets/music.m4a")?;
+    let len = file.metadata()?.len();
+    let decoder = DecoderBuilder::new()
+        .with_data(file)
+        // Note: the length must be known for Symphonia to properly detect the format for this file
+        // This limitation will be removed in Symphonia 0.6
+        .with_byte_len(len)
+        .with_decoder::<AacDecoder>()
+        .build()?;
+    sink.append(decoder);
+
+    sink.sleep_until_end();
+
+    Ok(())
+}
diff --git a/flake.nix b/flake.nix
index c3b7b2d9..43397cbc 100644
--- a/flake.nix
+++ b/flake.nix
@@ -8,7 +8,7 @@
     inputs: inputs.utils.lib.eachDefaultSystem (
       system: let
         pkgs = inputs.nixpkgs.legacyPackages.${system}.extend inputs.rust-overlay.overlays.default;
-        rust = pkgs.rust-bin.stable."1.87.0".default.override {
+        rust = pkgs.rust-bin.stable."1.89.0".default.override {
           extensions = [ "rust-src" "rust-analyzer" ];
         };
       in {
diff --git a/src/decoder/builder.rs b/src/decoder/builder.rs
index 8d6dc247..7897d239 100644
--- a/src/decoder/builder.rs
+++ b/src/decoder/builder.rs
@@ -39,10 +39,18 @@
 
 use std::io::{Read, Seek};
 
+#[cfg(feature = "symphonia")]
+use crate::decoder::symphonia::Registry;
+
 #[cfg(feature = "symphonia")]
 use self::read_seek_source::ReadSeekSource;
 #[cfg(feature = "symphonia")]
-use ::symphonia::core::io::{MediaSource, MediaSourceStream};
+use ::symphonia::core::{
+    codecs::CodecRegistry,
+    io::{MediaSource, MediaSourceStream},
+};
+#[cfg(feature = "symphonia")]
+use ::symphonia::default::register_enabled_codecs;
 
 use super::*;
 
@@ -77,6 +85,9 @@ pub struct Settings {
 
     /// Whether the decoder should report as seekable.
     pub(crate) is_seekable: bool,
+
+    #[cfg(feature = "symphonia")]
+    pub(crate) codec_registry: Registry,
 }
 
 impl Default for Settings {
@@ -88,6 +99,14 @@ impl Default for Settings {
             hint: None,
             mime_type: None,
             is_seekable: false,
+            #[cfg(feature = "symphonia")]
+            codec_registry: {
+                let mut codec_registry = CodecRegistry::new();
+                register_enabled_codecs(&mut codec_registry);
+                #[cfg(feature = "symphonia-libopus")]
+                codec_registry.register_all::<symphonia_adapter_libopus::OpusDecoder>();
+                Registry::new(codec_registry)
+            },
         }
     }
 }
@@ -231,6 +250,19 @@ impl<R: Read + Seek + Send + Sync + 'static> DecoderBuilder<R> {
         self
     }
 
+    /// Adds a third-party decoder.
+    /// If multiple decoders for the same codec are registered, the one registered last will take precedence.
+    ///
+    /// See the documentation for [CodecRegistry] for more info.
+    #[cfg(feature = "symphonia")]
+    pub fn with_decoder<D>(self) -> Self
+    where
+        D: ::symphonia::core::codecs::Decoder,
+    {
+        self.settings.codec_registry.write().register_all::<D>();
+        self
+    }
+
     /// Configure whether the data supports random access seeking. Without this,
     /// only forward seeking may work.
     ///
diff --git a/src/decoder/symphonia.rs b/src/decoder/symphonia.rs
index fa98f307..0774c31d 100644
--- a/src/decoder/symphonia.rs
+++ b/src/decoder/symphonia.rs
@@ -1,9 +1,12 @@
 use core::time::Duration;
-use std::sync::Arc;
+use std::{
+    fmt::{self, Debug},
+    sync::{Arc, RwLock, RwLockReadGuard, RwLockWriteGuard},
+};
 use symphonia::{
     core::{
         audio::{AudioBufferRef, SampleBuffer, SignalSpec},
-        codecs::{Decoder, DecoderOptions, CODEC_TYPE_NULL},
+        codecs::{CodecRegistry, Decoder, DecoderOptions, CODEC_TYPE_NULL},
         errors::Error,
         formats::{FormatOptions, FormatReader, SeekMode, SeekTo, SeekedTo},
         io::MediaSourceStream,
@@ -20,6 +23,29 @@ use crate::{
     source, Source,
 };
 
+#[derive(Clone)]
+pub(crate) struct Registry(Arc<RwLock<CodecRegistry>>);
+
+impl Debug for Registry {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str("Registry")
+    }
+}
+
+impl Registry {
+    pub(crate) fn new(registry: CodecRegistry) -> Self {
+        Self(Arc::new(RwLock::new(registry)))
+    }
+
+    pub(crate) fn write(&self) -> RwLockWriteGuard<'_, CodecRegistry> {
+        self.0.write().unwrap()
+    }
+
+    pub(crate) fn read(&self) -> RwLockReadGuard<'_, CodecRegistry> {
+        self.0.read().unwrap()
+    }
+}
+
 pub(crate) struct SymphoniaDecoder {
     decoder: Box<dyn Decoder>,
     current_span_offset: usize,
@@ -102,9 +128,12 @@ impl SymphoniaDecoder {
             None => return Ok(None),
         };
 
-        let mut decoder = symphonia::default::get_codecs()
+        let mut decoder = settings
+            .codec_registry
+            .read()
             .make(&track.codec_params, &DecoderOptions::default())?;
-        let total_duration: Option<Duration> = track
+
+        let total_duration = track
             .codec_params
             .time_base
             .zip(stream.codec_params.n_frames)
diff --git a/src/lib.rs b/src/lib.rs
index 27bda4ae..92e840cb 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -118,6 +118,9 @@
 //! or enabling specific codecs using one of the `symphonia-{codec name}` features.
 //! By default, decoders for the most common file types (flac, mp3, mp4, vorbis, wav) are enabled.
 //!
+//! See the [symphonia docs](https://docs.rs/symphonia/latest/symphonia) for the complete
+//! list of supported formats.
+//!
 //! ### Alternative Decoders
 //!
 //! Alternative decoder libraries are available for some filetypes: