diff --git a/js/actionCreators/files.ts b/js/actionCreators/files.ts
index 4980a083..98e632d6 100644
--- a/js/actionCreators/files.ts
+++ b/js/actionCreators/files.ts
@@ -267,7 +267,19 @@ export function loadMediaFile(
 
     if (metaData != null) {
       const { artist, title, album } = metaData;
-      dispatch({ type: SET_MEDIA_TAGS, artist, title, album, id });
+      dispatch({
+        type: SET_MEDIA_TAGS,
+        artist,
+        title,
+        album,
+        // For now, we lie about these next three things.
+        // TODO: Ideally we would leave these as null and force a media data
+        // fetch when the user starts playing.
+        sampleRate: 44000,
+        bitrate: 192000,
+        numberOfChannels: 2,
+        id
+      });
     } else if ("blob" in track) {
       // Blobs can be loaded quickly
       dispatch(fetchMediaTags(track.blob, id));
diff --git a/js/actionCreators/media.ts b/js/actionCreators/media.ts
index 46b67efd..4a8c1b80 100644
--- a/js/actionCreators/media.ts
+++ b/js/actionCreators/media.ts
@@ -17,6 +17,7 @@ import {
 import { MEDIA_STATUS } from "../constants";
 import { openMediaFileDialog } from "./";
 import { GetState, Dispatch, Dispatchable } from "../types";
+import * as Selectors from "../selectors";
 
 function playRandomTrack(): Dispatchable {
   return (dispatch: Dispatch, getState: GetState) => {
@@ -91,14 +92,16 @@ export function previous(): Dispatchable {
 
 export function seekForward(seconds: number): Dispatchable {
   return function(dispatch, getState) {
-    const { timeElapsed, length } = getState().media;
-    if (length == null) {
+    const state = getState();
+    const timeElapsed = Selectors.getTimeElapsed(state);
+    const duration = Selectors.getDuration(state);
+    if (duration == null) {
       return;
     }
     const newTimeElapsed = timeElapsed + seconds;
     dispatch({
       type: SEEK_TO_PERCENT_COMPLETE,
-      percent: (newTimeElapsed / length) * 100
+      percent: (newTimeElapsed / duration) * 100
     });
   };
 }
diff --git a/js/actionTypes.ts b/js/actionTypes.ts
index 891a82f7..9783752f 100644
--- a/js/actionTypes.ts
+++ b/js/actionTypes.ts
@@ -60,7 +60,6 @@ export const MEDIA_TAG_REQUEST_FAILED = "MEDIA_TAG_REQUEST_FAILED";
 export const NETWORK_CONNECTED = "NETWORK_CONNECTED";
 export const NETWORK_DISCONNECTED = "NETWORK_DISCONNECTED";
 export const UPDATE_WINDOW_POSITIONS = "UPDATE_WINDOW_POSITIONS";
-export const CHANNEL_COUNT_CHANGED = "CHANNEL_COUNT_CHANGED";
 export const WINDOW_SIZE_CHANGED = "WINDOW_SIZE_CHANGED";
 export const TOGGLE_WINDOW_SHADE_MODE = "TOGGLE_WINDOW_SHADE_MODE";
 export const LOADED = "LOADED";
diff --git a/js/components/MainWindow/Kbps.js b/js/components/MainWindow/Kbps.js
deleted file mode 100644
index 3d0688a7..00000000
--- a/js/components/MainWindow/Kbps.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import React from "react";
-import { connect } from "react-redux";
-
-import CharacterString from "../CharacterString";
-
-const Kbps = props => (
-  <div id="kbps">
-    <CharacterString>{props.kbps}</CharacterString>
-  </div>
-);
-
-export default connect(state => ({ kbps: state.media.kbps }))(Kbps);
diff --git a/js/components/MainWindow/Kbps.tsx b/js/components/MainWindow/Kbps.tsx
new file mode 100644
index 00000000..d7b3d87f
--- /dev/null
+++ b/js/components/MainWindow/Kbps.tsx
@@ -0,0 +1,22 @@
+import React from "react";
+import { connect } from "react-redux";
+
+import CharacterString from "../CharacterString";
+import { AppState } from "../../types";
+import * as Selectors from "../../selectors";
+
+interface StateProps {
+  kbps: string | null;
+}
+
+const Kbps = (props: StateProps) => (
+  <div id="kbps">
+    <CharacterString>{props.kbps || ""}</CharacterString>
+  </div>
+);
+
+function mapStateToProps(state: AppState): StateProps {
+  return { kbps: Selectors.getKbps(state) };
+}
+
+export default connect(mapStateToProps)(Kbps);
diff --git a/js/components/MainWindow/Khz.js b/js/components/MainWindow/Khz.js
deleted file mode 100644
index 7d689b4f..00000000
--- a/js/components/MainWindow/Khz.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import React from "react";
-import { connect } from "react-redux";
-
-import CharacterString from "../CharacterString";
-
-const Khz = props => (
-  <div id="khz">
-    <CharacterString>{props.khz}</CharacterString>
-  </div>
-);
-
-export default connect(state => state.media)(Khz);
diff --git a/js/components/MainWindow/Khz.tsx b/js/components/MainWindow/Khz.tsx
new file mode 100644
index 00000000..8ddd9ab2
--- /dev/null
+++ b/js/components/MainWindow/Khz.tsx
@@ -0,0 +1,22 @@
+import React from "react";
+import { connect } from "react-redux";
+
+import CharacterString from "../CharacterString";
+import { AppState } from "../../types";
+import * as Selectors from "../../selectors";
+
+interface StateProps {
+  khz: string | null;
+}
+
+const Khz = (props: StateProps) => (
+  <div id="khz">
+    <CharacterString>{props.khz || ""}</CharacterString>
+  </div>
+);
+
+function mapStateToProps(state: AppState): StateProps {
+  return { khz: Selectors.getKhz(state) };
+}
+
+export default connect(mapStateToProps)(Khz);
diff --git a/js/components/MainWindow/Position.js b/js/components/MainWindow/Position.tsx
similarity index 53%
rename from js/components/MainWindow/Position.js
rename to js/components/MainWindow/Position.tsx
index 6daa353c..21434f45 100644
--- a/js/components/MainWindow/Position.js
+++ b/js/components/MainWindow/Position.tsx
@@ -1,5 +1,6 @@
 import React from "react";
 import { connect } from "react-redux";
+import { AppState, Dispatch } from "../../types";
 
 import {
   SEEK_TO_PERCENT_COMPLETE,
@@ -7,13 +8,26 @@ import {
   UNSET_FOCUS,
   SET_SCRUB_POSITION
 } from "../../actionTypes";
+import * as Selectors from "../../selectors";
+
+interface StateProps {
+  displayedPosition: number;
+  position: number;
+}
+
+interface DispatchProps {
+  seekToPercentComplete(e: React.MouseEvent<HTMLInputElement>): void;
+  setPosition(e: React.MouseEvent<HTMLInputElement>): void;
+}
+
+type Props = StateProps & DispatchProps;
 
 const Position = ({
   position,
   seekToPercentComplete,
   displayedPosition,
   setPosition
-}) => {
+}: Props) => {
   // In shade mode, the position slider shows up differently depending on if
   // it's near the start, middle or end of its progress
   let className = "";
@@ -43,16 +57,15 @@ const Position = ({
   );
 };
 
-const mapStateToProps = ({ media, userInput }) => {
-  let position;
-  if (media.length) {
-    position = (Math.floor(media.timeElapsed) / media.length) * 100;
-  } else {
-    position = 0;
-  }
+const mapStateToProps = (state: AppState): StateProps => {
+  const duration = Selectors.getDuration(state);
+  const timeElapsed = Selectors.getTimeElapsed(state);
+  const userInputFocus = Selectors.getUserInputFocus(state);
+  const scrubPosition = Selectors.getUserInputScrubPosition(state);
+  const position = duration ? (Math.floor(timeElapsed) / duration) * 100 : 0;
 
   const displayedPosition =
-    userInput.focus === "position" ? userInput.scrubPosition : position;
+    userInputFocus === "position" ? scrubPosition : position;
 
   return {
     displayedPosition,
@@ -60,14 +73,20 @@ const mapStateToProps = ({ media, userInput }) => {
   };
 };
 
-const mapDispatchToProps = dispatch => ({
+const mapDispatchToProps = (dispatch: Dispatch): DispatchProps => ({
   seekToPercentComplete: e => {
-    dispatch({ type: SEEK_TO_PERCENT_COMPLETE, percent: e.target.value });
+    dispatch({
+      type: SEEK_TO_PERCENT_COMPLETE,
+      percent: Number((e.target as HTMLInputElement).value)
+    });
     dispatch({ type: UNSET_FOCUS });
   },
   setPosition: e => {
     dispatch({ type: SET_FOCUS, input: "position" });
-    dispatch({ type: SET_SCRUB_POSITION, position: e.target.value });
+    dispatch({
+      type: SET_SCRUB_POSITION,
+      position: Number((e.target as HTMLInputElement).value)
+    });
   }
 });
 
diff --git a/js/components/MainWindow/Time.tsx b/js/components/MainWindow/Time.tsx
index 96daca1e..51b315c5 100644
--- a/js/components/MainWindow/Time.tsx
+++ b/js/components/MainWindow/Time.tsx
@@ -4,11 +4,12 @@ import { TimeMode, AppState, Dispatch } from "../../types";
 import { getTimeObj } from "../../utils";
 
 import * as Actions from "../../actionCreators";
+import * as Selectors from "../../selectors";
 import { TIME_MODE } from "../../constants";
 
 interface StateProps {
   timeElapsed: number;
-  length: number;
+  duration: number;
   timeMode: TimeMode;
 }
 
@@ -18,12 +19,12 @@ interface DispatchProps {
 
 const Time = ({
   timeElapsed,
-  length,
+  duration,
   timeMode,
   toggleTimeMode
 }: StateProps & DispatchProps) => {
   const seconds =
-    timeMode === TIME_MODE.ELAPSED ? timeElapsed : length - timeElapsed;
+    timeMode === TIME_MODE.ELAPSED ? timeElapsed : duration - timeElapsed;
 
   const timeObj = getTimeObj(seconds);
   return (
@@ -50,8 +51,10 @@ const Time = ({
 };
 
 const mapStateToProps = (state: AppState): StateProps => {
-  const { timeElapsed, length, timeMode } = state.media;
-  return { timeElapsed, length: length || 0, timeMode };
+  const timeElapsed = Selectors.getTimeElapsed(state);
+  const duration = Selectors.getDuration(state);
+  const { timeMode } = state.media;
+  return { timeElapsed, duration: duration || 0, timeMode };
 };
 const mapDispatchToProps = (dispatch: Dispatch): DispatchProps => ({
   toggleTimeMode: () => dispatch(Actions.toggleTimeMode())
diff --git a/js/components/MiniTime.tsx b/js/components/MiniTime.tsx
index 9c746b16..5a9f6aee 100644
--- a/js/components/MiniTime.tsx
+++ b/js/components/MiniTime.tsx
@@ -1,4 +1,4 @@
-import { AppState, Action } from "../types";
+import { AppState, Action, Dispatchable, Dispatch } from "../types";
 import React from "react";
 import { connect } from "react-redux";
 import classnames from "classnames";
@@ -6,6 +6,7 @@ import { getTimeObj } from "../utils";
 import { TOGGLE_TIME_MODE } from "../actionTypes";
 import { TIME_MODE, MEDIA_STATUS } from "../constants";
 import Character from "./Character";
+import * as Selectors from "../selectors";
 
 import "../../css/mini-time.css";
 
@@ -26,15 +27,20 @@ const Background = () => (
   </React.Fragment>
 );
 
-type StateProps = {
+interface StateProps {
   status: string | null;
   timeMode: string;
   timeElapsed: number;
   length: number | null;
-  toggle: () => void;
-};
+}
 
-const MiniTime = (props: StateProps) => {
+interface DispatchProps {
+  toggle: () => void;
+}
+
+type Props = StateProps & DispatchProps;
+
+const MiniTime = (props: Props) => {
   let seconds = null;
   // TODO: Clean this up: If stopped, just render the background, rather than
   // rendering spaces twice.
@@ -66,14 +72,14 @@ const MiniTime = (props: StateProps) => {
   );
 };
 
-const mapStateToProps = (state: AppState) => ({
+const mapStateToProps = (state: AppState): StateProps => ({
   status: state.media.status,
   timeMode: state.media.timeMode,
-  timeElapsed: state.media.timeElapsed,
-  length: state.media.length
+  timeElapsed: Selectors.getTimeElapsed(state),
+  length: Selectors.getDuration(state)
 });
 
-const mapDispatchToProps = (dispatch: (action: Action) => void) => ({
+const mapDispatchToProps = (dispatch: Dispatch): DispatchProps => ({
   // TODO: move to actionCreators
   toggle: () => {
     dispatch({ type: TOGGLE_TIME_MODE });
diff --git a/js/media/elementSource.ts b/js/media/elementSource.ts
index a88b4c07..b48bd88e 100644
--- a/js/media/elementSource.ts
+++ b/js/media/elementSource.ts
@@ -147,16 +147,6 @@ export default class ElementSource {
     return this._audio.currentTime;
   }
 
-  getNumberOfChannels() {
-    return this._source.channelCount;
-  }
-
-  getSampleRate() {
-    // This is a lie. This is the sample rate of the context, not the
-    // underlying source media.
-    return this._context.sampleRate;
-  }
-
   _setStatus(status: MediaStatus) {
     this._status = status;
     this._emitter.trigger("statusChange");
diff --git a/js/media/index.ts b/js/media/index.ts
index 9d3858f3..4c4f5680 100644
--- a/js/media/index.ts
+++ b/js/media/index.ts
@@ -17,7 +17,6 @@ function createStereoPanner(context: AudioContext): StereoPannerNode {
 export default class Media {
   _emitter: Emitter;
   _context: AudioContext;
-  _channels: number | null;
   _balance: number;
   _staticSource: AnalyserNode;
   _preamp: GainNode;
@@ -52,8 +51,6 @@ export default class Media {
       document.body.addEventListener("click", resume, false);
       document.body.addEventListener("keydown", resume, false);
     }
-    // We don't currently know how many channels
-    this._channels = null;
     this._balance = 0;
 
     // The _source node has to be recreated each time it's stopped or
@@ -152,11 +149,6 @@ export default class Media {
     this._gainNode.connect(this._context.destination);
   }
 
-  _setChannels(num: number | null) {
-    this._channels = num;
-    this._emitter.trigger("channelupdate");
-  }
-
   getAnalyser() {
     return this._analyser;
   }
@@ -178,14 +170,6 @@ export default class Media {
     return (this.timeElapsed() / this.duration()) * 100;
   }
 
-  channels() {
-    return this._channels == null ? 2 : this._channels;
-  }
-
-  sampleRate() {
-    return this._source.getSampleRate();
-  }
-
   /* Actions */
   async play() {
     await this._source.play();
@@ -248,7 +232,6 @@ export default class Media {
   async loadFromUrl(url: string, autoPlay: boolean) {
     this._emitter.trigger("waiting");
     await this._source.loadUrl(url);
-    this._setChannels(null);
     this._emitter.trigger("stopWaiting");
     if (autoPlay) {
       this.play();
diff --git a/js/mediaMiddleware.ts b/js/mediaMiddleware.ts
index 31c67e56..9e2dc151 100644
--- a/js/mediaMiddleware.ts
+++ b/js/mediaMiddleware.ts
@@ -17,7 +17,6 @@ import {
   SET_EQ_ON,
   PLAY_TRACK,
   BUFFER_TRACK,
-  CHANNEL_COUNT_CHANGED,
   LOAD_SERIALIZED_STATE
 } from "./actionTypes";
 import { next as nextTrack } from "./actionCreators";
@@ -70,19 +69,12 @@ export default (media: Media) => (store: MiddlewareStore) => {
       id,
       type: SET_MEDIA,
       kbps: "128",
-      khz: Math.round(media.sampleRate() / 1000).toString(),
-      channels: media.channels(),
+      khz: "44",
+      channels: 2,
       length: media.duration()
     });
   });
 
-  media.on("channelupdate", () => {
-    store.dispatch({
-      type: CHANNEL_COUNT_CHANGED,
-      channels: media.channels()
-    });
-  });
-
   return (next: Dispatch) => (action: Action) => {
     const returnValue = next(action);
     const state = store.getState();
diff --git a/js/reducers/media.ts b/js/reducers/media.ts
index 03688a93..8f8d4446 100644
--- a/js/reducers/media.ts
+++ b/js/reducers/media.ts
@@ -14,7 +14,6 @@ import {
   TOGGLE_TIME_MODE,
   UPDATE_TIME_ELAPSED,
   ADD_TRACK_FROM_URL,
-  CHANNEL_COUNT_CHANGED,
   LOAD_SERIALIZED_STATE
 } from "../actionTypes";
 import { TIME_MODE, MEDIA_STATUS } from "../constants";
@@ -23,12 +22,8 @@ import { MediaSerializedStateV1 } from "../serializedStates/v1Types";
 export interface MediaState {
   timeMode: TimeMode; // TODO: Convert this to an enum
   timeElapsed: number;
-  length: number | null;
-  kbps: string | null;
-  khz: string | null;
   volume: number;
   balance: number;
-  channels: number | null; // TODO: Convert this to an enum
   shuffle: boolean;
   repeat: boolean;
   status: MediaStatus | null; // TODO: Convert this to an enum
@@ -37,15 +32,12 @@ export interface MediaState {
 const defaultState = {
   timeMode: TIME_MODE.ELAPSED,
   timeElapsed: 0,
-  length: null, // Consider renaming to "duration"
-  kbps: null,
-  khz: null,
+
   // The winamp ini file declares the default volume as "200".
   // The UI seems to show a default volume near 78, which would
   // math with the default value being 200 out of 255.
   volume: Math.round((200 / 255) * 100),
   balance: 0,
-  channels: null,
   shuffle: false,
   repeat: false,
   // TODO: Enforce possible values
@@ -66,8 +58,6 @@ const media = (
     case STOP:
     case IS_STOPPED:
       return { ...state, status: MEDIA_STATUS.STOPPED };
-    case CHANNEL_COUNT_CHANGED:
-      return { ...state, channels: action.channels };
     case TOGGLE_TIME_MODE:
       const newMode =
         state.timeMode === TIME_MODE.REMAINING
@@ -79,28 +69,11 @@ const media = (
     case ADD_TRACK_FROM_URL:
       return {
         ...state,
-        timeElapsed: 0,
-        length: null,
-        kbps: null,
-        khz: null,
-        channels: null
+        timeElapsed: 0
       };
     case SET_MEDIA:
       return {
-        ...state,
-        length: action.length,
-        kbps: action.kbps,
-        khz: action.khz,
-        channels: action.channels
-      };
-    case SET_MEDIA_TAGS:
-      const { sampleRate, bitrate, numberOfChannels } = action;
-      const { kbps, khz, channels } = state;
-      return {
-        ...state,
-        kbps: bitrate != null ? String(Math.round(bitrate / 1000)) : kbps,
-        khz: sampleRate != null ? String(Math.round(sampleRate / 1000)) : khz,
-        channels: numberOfChannels != null ? numberOfChannels : channels
+        ...state
       };
     case SET_VOLUME:
       return { ...state, volume: action.volume };
diff --git a/js/reducers/tracks.ts b/js/reducers/tracks.ts
index 42effa6e..38cfce71 100644
--- a/js/reducers/tracks.ts
+++ b/js/reducers/tracks.ts
@@ -42,19 +42,6 @@ const tracks = (
         [action.id]: newTrack
       };
     }
-    case SET_MEDIA_TAGS: {
-      return {
-        ...state,
-        [action.id]: {
-          ...state[action.id],
-          mediaTagsRequestStatus: MEDIA_TAG_REQUEST_STATUS.COMPLETE,
-          title: action.title,
-          artist: action.artist,
-          album: action.album,
-          albumArtUrl: action.albumArtUrl
-        }
-      };
-    }
     case MEDIA_TAG_REQUEST_INITIALIZED:
       return {
         ...state,
@@ -80,6 +67,32 @@ const tracks = (
         }
       };
     }
+    case SET_MEDIA_TAGS:
+      const track = state[action.id];
+      const {
+        sampleRate,
+        bitrate,
+        numberOfChannels,
+        title,
+        artist,
+        album,
+        albumArtUrl
+      } = action;
+      const { kbps, khz, channels } = track;
+      return {
+        ...state,
+        [action.id]: {
+          ...track,
+          mediaTagsRequestStatus: MEDIA_TAG_REQUEST_STATUS.COMPLETE,
+          title,
+          artist,
+          album,
+          albumArtUrl,
+          kbps: bitrate != null ? String(Math.round(bitrate / 1000)) : kbps,
+          khz: sampleRate != null ? String(Math.round(sampleRate / 1000)) : khz,
+          channels: numberOfChannels != null ? numberOfChannels : channels
+        }
+      };
     default:
       return state;
   }
diff --git a/js/screenshotInitialState.ts b/js/screenshotInitialState.ts
index 2e4a3698..6935fe8b 100644
--- a/js/screenshotInitialState.ts
+++ b/js/screenshotInitialState.ts
@@ -7,28 +7,40 @@ const defaultTracksState = {
     title: "Llama Whipping Intro",
     artist: "DJ Mike Llama",
     duration: 5,
-    url: ""
+    url: "",
+    kbps: "128",
+    khz: "44",
+    channels: 2
   },
   "1": {
     id: 1,
     title: "Rock Is Dead",
     artist: "Marilyn Manson",
     duration: 191, // 3:11
-    url: ""
+    url: "",
+    kbps: "128",
+    khz: "44",
+    channels: 2
   },
   "2": {
     id: 2,
     title: "Spybreak! (Short One)",
     artist: "Propellerheads",
     duration: 240, // 4:00
-    url: ""
+    url: "",
+    kbps: "128",
+    khz: "44",
+    channels: 2
   },
   "3": {
     id: 3,
     title: "Bad Blood",
     artist: "Ministry",
     duration: 300, // 5:00
-    url: ""
+    url: "",
+    kbps: "128",
+    khz: "44",
+    channels: 2
   }
 };
 
@@ -50,11 +62,7 @@ const initialState: DeepPartial<AppState> = {
   },
   media: {
     status: "PLAYING",
-    kbps: "128",
-    khz: "44",
-    length: 5,
-    timeElapsed: 3,
-    channels: 2
+    timeElapsed: 3
   },
   playlist: {
     trackOrder: [0, 1, 2, 3],
diff --git a/js/selectors.ts b/js/selectors.ts
index c401df53..d76d25a0 100644
--- a/js/selectors.ts
+++ b/js/selectors.ts
@@ -454,7 +454,17 @@ export const getBalance = (state: AppState) => state.media.balance;
 export const getShuffle = (state: AppState) => state.media.shuffle;
 export const getRepeat = (state: AppState) => state.media.repeat;
 
-export const getChannels = (state: AppState) => state.media.channels;
+export const getChannels = createSelector(
+  getCurrentTrack,
+  (track: PlaylistTrack | null): number | null => {
+    return track != null ? track.channels || null : null;
+  }
+);
+
+export const getTimeElapsed = (state: AppState): number => {
+  return state.media.timeElapsed;
+};
+
 export function getSerlializedState(state: AppState): SerializedStateV1 {
   return {
     version: 1,
@@ -496,25 +506,33 @@ export const getStackedLayoutPositions = createSelector(
   }
 );
 
+export const getUserInputFocus = (state: AppState): string | null => {
+  return state.userInput.focus;
+};
+
+export const getUserInputScrubPosition = (state: AppState): number => {
+  return state.userInput.scrubPosition;
+};
 // TODO: Make this a reselect selector
 export const getMarqueeText = (state: AppState): string => {
   const defaultText = "Winamp 2.91";
   if (state.userInput.userMessage != null) {
     return state.userInput.userMessage;
   }
-  switch (state.userInput.focus) {
+  switch (getUserInputFocus(state)) {
     case "balance":
       return MarqueeUtils.getBalanceText(state.media.balance);
     case "volume":
       return MarqueeUtils.getVolumeText(state.media.volume);
     case "position":
-      if (state.media.length == null) {
+      const duration = getDuration(state);
+      if (duration == null) {
         // This probably can't ever happen.
         return defaultText;
       }
       return MarqueeUtils.getPositionText(
-        state.media.length,
-        state.userInput.scrubPosition
+        duration,
+        getUserInputScrubPosition(state)
       );
     case "double":
       return MarqueeUtils.getDoubleSizeModeText(state.display.doubled);
@@ -539,6 +557,20 @@ export const getMarqueeText = (state: AppState): string => {
   return defaultText;
 };
 
+export const getKbps = createSelector(
+  getCurrentTrack,
+  (track: PlaylistTrack | null): string | null => {
+    return track != null ? track.kbps || null : null;
+  }
+);
+
+export const getKhz = createSelector(
+  getCurrentTrack,
+  (track: PlaylistTrack | null): string | null => {
+    return track != null ? track.khz || null : null;
+  }
+);
+
 export function getDebugData(state: AppState) {
   return {
     ...state,
diff --git a/js/types.ts b/js/types.ts
index d8928830..51f81ff9 100644
--- a/js/types.ts
+++ b/js/types.ts
@@ -168,10 +168,6 @@ export type Action =
   | {
       type: "IS_STOPPED";
     }
-  | {
-      type: "CHANNEL_COUNT_CHANGED";
-      channels: number;
-    }
   | {
       type: "TOGGLE_TIME_MODE";
     }
@@ -526,6 +522,9 @@ export interface PlaylistTrack {
   albumArtUrl?: string | null;
   mediaTagsRequestStatus: MediaTagRequestStatus;
   duration: number | null;
+  kbps?: string;
+  khz: string;
+  channels?: number;
 }
 
 export interface AppState {