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Yes, connecting Bluetooth speakers or headphones directly to the Google TV dongle or the BenQ TH575i projector will cause an audio delay. Latency typically ranges between
100 ms to 300 ms, which results in noticeable lip-sync issues when watching movies or videos. [
1,
2]
Here is why it happens and the most effective ways to fix or minimize the delay:
Why Does It Happen?
- Bluetooth Physics: Wireless audio encoding and decoding add inherent lag.
- Lack of Low-Latency Codecs: The BenQ TH575i primarily supports the standard SBC audio codec, which is not optimized for low-latency video streaming.
- Projector Processing: The Google TV dongle and projector add minor processing delays to sync the high-definition video. [1, 2, 3]
How to Fix or Minimize the Delay
1. Adjust the Audio Delay on Google TV
If your Bluetooth audio is slightly behind the picture, you can manually offset the audio timing in the Google TV settings.
- Go to Settings > Display & Sound > Audio > Audio Delay (or A/V Sync).
- Adjust the slider until the sound and lip movements match perfectly. [1, 2]
2. Pair Directly to the Google TV Dongle
If you are using the included Google TV streaming dongle, pair your Bluetooth device directly to the dongle itself rather than the projector's main settings. This utilizes the Android TV ecosystem's internal sync, which is generally more stable and yields less lag. [
1,
2]
3. Use a Wired Connection (Recommended for Gaming)
Because absolute zero latency is impossible with standard Bluetooth, using a wired connection is always the best solution—especially if you plan on gaming. [
1,
2]
- Plug your speakers or sound system directly into your media source (e.g., your game console, streaming box, or Blu-ray player) using an AUX or Optical cable. []
4. Shorten the Distance and Clear Obstacles
Physical barriers and distance can cause Bluetooth dropouts and add latency.
- Place your Bluetooth speaker or headphones within 2 meters of the projector/dongle with a clear line of sight. [1]
Could you tell me
what type of Bluetooth speaker or headphones you are trying to connect? If you have an
Audio/Video Receiver or a Soundbar, I can help you set up a
lag-free wired configuration instead.
