Yamaha TW-E3C True Wireless Earbuds (Red) - Manual (Page 48)

The sound is distorted, noisy or choppy
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The signal may not be coming in clearly, making the connection unstable.
Move away from wireless devices such as access points, or appliances that produce electromagnetic
waves such as microwave ovens.
Try placing the connected Bluetooth device as close to this product as you can.
Devices with wireless network connectivity may transmit signals that obstruct Bluetooth
communications. In this case, turn off the wireless network connectivity feature on your Bluetooth
device.
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The product is temporarily not functioning in a stable way.
After putting the earbuds back into the charging case, wait for at least 10 seconds and then take them
out again.
If this does not solve the problem, initialize (factory reset) the earbuds.
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“Initializing (performing a factory reset)” (p.50)
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GAMING MODE is ON.
Set GAMING MODE to OFF.
When using GAMING MODE, the video/audio latency may change or the sound quality and connection
stability may degrade, depending on the usage environment and how you wear the product.
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“Playing back Audio on this product” (p.31)
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“App settings” (p.37)
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Troubleshooting > The sound is distorted, noisy or choppy