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Interactive user guide

Audikast 3 Setup Guide

TV audio setup

Choose Optical or AUX, then connect your Classic Bluetooth headphones.

Start setupFix a problem
TV Audio OUTOptical or AUX
Audikast 3TV audio transmitter
Your headphonesClassic Bluetooth

Connect one TV audio cable. Pair up to two headphones.

Will my hearing aids work?

Audikast 3 supports Classic Bluetooth audio only. It does not support Auracast, LE Audio, MFi or ASHA hearing-aid connections.

Compatibility depends on the exact hearing-aid model.

Check your hearing-aid model →

Step 01

Choose your TV audio OUT

TaskChoose one TV audio output. Use an OUT port, not IN.

Choose Optical first

Use OPTICAL or DIGITAL AUDIO OUT.

Recommended

TV Optical Digital Audio Out square port
Optical cable with purple square ends
Optical cable
Purple tips

No Optical? Use AUX

Use HEADPHONES, AUX OUT or AUDIO OUT.

TV headphone audio output
3.5 mm AUX cable with blue ends
AUX cable
Blue ends
Only RCA or HDMI ARC/eARC?

Audikast 3 has no RCA or HDMI input. RCA requires an RCA-to-3.5 mm adapter. HDMI ARC/eARC requires an audio extractor such as the Avantree HAX06.

Adapters are separate accessories.

DoneYou have chosen one TV OUT. Use its matching cable in Step 02.

If notSend Support a TV-port photo and the TV model.

Step 02

Connect Audikast 3 to the TV

TaskPower Audikast 3, then connect only the cable chosen in Step 01.

  1. Connect the power cable

    Plug the USB-C end into Audikast 3.

    Plug the other end into either:

    • Powered TV USB port
    • 5 V USB wall adapter

    Use a 5 V supply rated 1–2.4 A.
    USB supplies power—not TV audio.

  2. Turn on Audikast 3

    Slide the power switch to ON.

    The indicators turn on.

    No lights? Reconnect both power-cable ends, then try the other power source.

  3. Connect one TV audio cable

    Use the cable chosen in Step 01. Do not connect both.

    Optical

    Remove both clear cable tip covers.

    TVOPTICAL OUT
    Optical cable with purple square ends
    Purple tips
    Audikast 3OPTICAL

    Connect TV OPTICAL OUT to Audikast 3 OPTICAL.

    Set the input selector to OPT.

    Both square plugs are fully inserted.

    Set TV Optical audio →

    Or use AUX

    TVHEADPHONES
    / AUDIO OUT
    3.5 mm AUX cable with blue round ends
    Blue ends
    Audikast 3AUX

    Connect TV HEADPHONES / AUDIO OUT to Audikast 3 AUX.

    Set the input selector to AUX.

    Both round plugs are fully inserted.

    Set TV AUX audio →

DoneAudikast 3 is on. One audio cable is connected and the input selector matches it.

If notReseat both audio-cable ends. Use TV AUDIO OUT, not IN.

Step 03

Set TV sound and check the signal

TaskUse your TV remote. Follow your cable below.

Optical

Set the TV to PCM

Open
Settings → Sound / Audio
Sound output
Optical, External Speaker or Audio System
Audio format
PCM or Stereo

Do not use Dolby, DTS, Auto or Bitstream. These may cause silence.

Open the TV PCM guide →
Choose your TV brand for PCM steps

Menu names vary by TV model and software version.

Samsung

Settings → All Settings → Sound → Sound Output → Optical. Then Expert Settings → Digital Output Audio Format → PCM.

LG

Settings → Sound → Sound Out → Optical Out Device. Set Digital Sound Output to PCM.

Sony

Settings → Display & Sound → Audio Output → Digital Audio Out → PCM.

TCL

Settings → Sound → Audio Output → Optical. Advanced Settings → Digital Audio Out → PCM.

Hisense

Settings → Sound → Audio Output → Optical. Set Digital Audio Out to PCM.

VIZIO

Settings → Audio → Digital Audio Out → PCM.

Roku

Settings → Audio → Digital Output Format (or S/PDIF and ARC) → PCM-Stereo / Stereo.

Panasonic

Menu → Sound → Digital Audio Out / Digital Audio Selection → PCM.

Philips

Settings → Display & Sound → Audio Output → Digital Audio Out → PCM.

Sharp

Settings → Sound → Advanced Audio Settings → Digital Audio Out Type → PCM.

Insignia

Settings → Display & Sound → Audio Output → Digital Audio Format → PCM.

Open the full TV brand PCM guide →

Cannot find the setting? Send Support your exact TV model.

AUX

Select Audio Out and raise volume

Sound output
Headphones or Audio Out, if required
TV volume
Raise to a normal listening level

No PCM setting is needed. The TV speakers may mute when its headphone port is used.

Final check

Check the selected input light

Play a TV program with speaking voices.

Optical cable
OPT indicator: solid white
AUX cable
AUX indicator: solid white

Solid white means TV audio is entering Audikast 3.

Want TV speakers on too?

Simultaneous speaker output depends on the TV.

Check TV speaker settings →

DoneThe selected OPT / AUX indicator stays solid white while TV audio plays.

If notOptical: recheck OUT and PCM. AUX: recheck OUT and raise TV volume. Check the audio signal →

Choose my headphones →

Step 04

Pair Classic Bluetooth headphones

Use this path for traditional Bluetooth headphones.

TaskPut Audikast 3 and the headphones into pairing mode.

  1. Start Audikast 3 pairing

    Find the left Left Bluetooth connection indicator light, just to the right of the Listener 1 button.

    On first use, Audikast 3 enters pairing automatically after power-on.

    Ready: Left Bluetooth connection indicator flashes red and blue.
    Not flashing? Hold the Listener 1 pairing button for about 5 seconds, until it flashes red and blue.

  2. Start headphone pairing

    Put your headphones into pairing mode. Keep them within 3 ft / 1 m of Audikast 3.

    Powering on alone may not start pairing.

    Headphone pairing helpChoose brand
    AirPods / AirPods Pro

    Check the back of your case.

    There is a button

    AirPods 1–3 / AirPods Pro 1–2

    1. Open the case with your AirPods inside.
    2. Hold the button on the back for about 5 seconds.
    AirPods case rear setup button held until the front status light flashes white

    Ready when: the case light flashes white.

    There is no button

    AirPods 4 or 5 / AirPods Pro 3

    1. Open the case with your AirPods inside.
    2. Double-tap the front of the case.
    AirPods 4 or 5, or AirPods Pro 3 case front double-tapped until the status light flashes white

    Ready when: the case light flashes white.

    AirPods Max
    1. Press and hold the noise control button for about 5 seconds.

    Ready when: the status light flashes white.

    Bose
    1. Turn on the headphones or open the earbud case.
    2. Hold the Bluetooth or power button until the light flashes blue or you hear “Ready to connect.”

    Ready when: the light flashes blue or the voice prompt confirms pairing.

    Beats
    1. Turn on the headphones.
    2. Hold the system or power button until the indicator flashes.

    Ready when: the indicator flashes for pairing.

    Sony
    1. With the headphones off, hold the power button for about 5 seconds.
    2. For Sony earbuds, use the case or touch-sensor pairing command for your exact model.

    Ready when: the light flashes blue or you hear “Bluetooth pairing.”

    Samsung Galaxy Buds
    1. Place both earbuds in the case, close it for 5–6 seconds, then open it.
    2. If pairing does not start, wear both earbuds and touch both touchpads until you hear the pairing sound.

    Ready when: the earbuds announce pairing or show their pairing pattern.

    JBL
    1. Hold the Bluetooth or power button until the indicator flashes rapidly.
    2. If JBL reconnects to a phone, turn that phone Bluetooth off and try again.

    Ready when: the indicator flashes rapidly.

    Other headphones
    1. Hold the power, Bluetooth, or main button until the light flashes rapidly.
    2. Check the headphone manual for the exact command if the light does not change.

    Ready when: the headphones show their documented pairing pattern.

    Buttons differ by model. Follow your headphone model’s manual if the controls do not match.

  3. Wait for connection

    Wait until Audikast 3’s Left Bluetooth connection indicator indicator stays solid blue.

    Solid blue means connected.

    Play a TV show with speaking voices. Adjust headphone volume.

    Watch: pair Audikast 3

DoneYou hear TV audio through the headphones. Left Bluetooth connection indicator stays solid blue.

If notSolid blue alone does not confirm TV audio. Check the OPT / AUX signal and headphone volume.

No sound? Check the lights →
Reconnect next time

Turn on Audikast 3 and your headphones. They should reconnect automatically. If not, disconnect nearby phones, then press Listener 1 to reconnect.

Add a second listener (optional)

Keep the first headphones connected.

Find the right Right Bluetooth connection indicator light, just to the left of the Listener 2 button.

  1. Put the second headphones in pairing mode.
  2. Hold Audikast 3’s Listener 2 button for 5 seconds until its indicator flashes red and blue.
  3. Keep the second headphones within 3 ft / 1 m. Wait for the right Right Bluetooth connection indicator indicator to turn solid blue.
  4. Play TV audio. Check that both headphones hear it.

Both Left Bluetooth connection indicator and Right Bluetooth connection indicator connection indicators are solid blue and both headphones play TV audio.

Still not connecting? Turn off Bluetooth on nearby phones and retry. More dual-link help →

Watch: pair a second listener

Quick help

Fix the common problems

01Connected, but no TV sound

a. Check the headphone connection

Check Audikast 3’s left Left Bluetooth connection indicator indicator (right Right Bluetooth connection indicator for the second headphones).

Not solid blue? The headphones are not connected. Put both devices in pairing mode and wait for solid blue.

b. Check the TV audio signal

Play TV audio. Check the OPT or AUX indicator for your selected input.

Flashing white: no valid TV audio
  1. Match the input selector: Optical → OPT; blue cable → AUX.
  2. Use TV AUDIO OUT, not IN. Reseat both cable ends.
  3. For Optical: select Optical output and PCM / Stereo. For AUX: select Headphones output if needed and raise TV volume.
  4. Try another TV show. After a TV update, check PCM again.

The selected OPT / AUX indicator turns solid white.

Solid white + solid blue, but still silent
  1. Unmute the headphones and increase their volume.
  2. For AUX, raise TV output volume too.
  3. Try another program. If only a streaming app is silent, check the source device’s digital audio format is PCM / Stereo.

Still silent? Open the official no-sound guide or contact Support with both indicator states.

Sound plays through the headphones—not just a blue connection light.

02Headphones will not pair or reconnect

A nearby phone connection or headphones not in pairing mode can prevent pairing.

  1. Turn off nearby phone Bluetooth. Put the headphones in pairing mode.
  2. Hold Audikast 3’s matching listener button for about 5 seconds until red and blue flash.
  3. Keep devices within 3 ft / 1 m and wait.

The matching listener indicator turns solid blue.

Still not connecting? Open pairing help →
03Sound is delayed

Delay depends on the headphones’ audio codec and TV processing.

  • Use headphones that support aptX Adaptive for better sync.
  • AirPods do not support aptX Adaptive. Some delay may remain.
  • Disable extra TV audio processing if available.

Speech and picture move closer together. Some delay may remain.

Changing the cable alone does not guarantee a fix. Open audio-delay help or ask Support about your exact models.

More Quick Fixes →