fix lipsync.h compile error

[mongonta0716]

This is an omission that was corrected when the library was changed to M5Unified.

#76

• [ x ] Bug fix

[mongonta0716]

Updated to M5Unified-compatible audio and talk samples.

[yoshipon]

(Sorry for the inconvinience. I deleted my duplicated comment.)

[yoshipon]

Thank you for the library migration!!!
I think simplicity is important for beginners.
So, if we don't need the custom configuration for Speaker, I think it is better to leave the default configuration.

What do you think?
Thank you in advance!

[yoshipon]

Suggested change

	auto cfg = M5.config();
	M5.begin(cfg);
	M5.begin();

[mongonta0716]

I think this one should remain.

[yoshipon]

Until the M5Unified's documentation is more solid, I'll try to supplement it with a few comments.

Like this? (this is just a suggestion based on your kind information on twitter👍)

Suggested change

	auto cfg = M5.config();
	M5.begin(cfg);
	auto cfg = M5.config(); // modify cfg for configurating M5 (details: https://github.com/m5stack/M5Unified/blob/master/examples/Basic/HowToUse/HowToUse.ino#L47-L60)
	M5.begin(cfg);

# すみません，お仕事増やしてしまい恐縮なので，適当にコメント考えてみました！ ご参考まで

[yoshipon]

Suggested change

	{ /// custom setting
	auto spk_cfg = M5.Speaker.config();
	/// Increasing the sample_rate will improve the sound quality instead of increasing the CPU load.
	spk_cfg.sample_rate = 96000; // default:64000 (64kHz) e.g. 48000 , 50000 , 80000 , 96000 , 100000 , 128000 , 144000 , 192000 , 200000
	M5.Speaker.config(spk_cfg);
	}

[mongonta0716]

Speaker(spk_cfg) may not need it, but as for M5.begin(), beginners are not familiar with M5Unified's Config method, so it is better to write it.

[yoshipon]

Thanks for your rapid reply! I see!!!
Kind tutorials are most important :)

[mongonta0716]

Yes, it is. It is indeed hard to understand.

Until the M5Unified's documentation is more solid, I'll try to supplement it with a few comments.