YM2149/PSG line level output?

By lintweaker

Master (172)

lintweaker's picture

01-07-2018, 17:30

Hi,
I am in the process of building a DIY MSX. Next on the list is adding the PSG for sound and joystick support.
Do a need additional amplification to get line level sound output? If so, any recommendations of op-amps to use? The system currently has no -12V, only +5 and +12V. I single power supply op-amps is preferable.

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By WORP3

Paladin (806)

WORP3's picture

02-07-2018, 15:26

Just use a bias voltage and AC couple your audio into this bias circuit. Then you can use a opamp powered with only 5 Volt if you want. Also use an AC coupling on the output !

Look over here for audio level: Audio levels

By WORP3

Paladin (806)

WORP3's picture

02-07-2018, 17:37

WORP3 wrote:

Just use a bias voltage and AC couple your audio into this bias circuit. Then you can use a opamp powered with only 5 Volt if you want. Also use an AC coupling on the output !

Look over here for audio level: Audio levels

Look at this site to get some examples.

By lintweaker

Master (172)

lintweaker's picture

03-07-2018, 19:41

WORP3 wrote:

Look at this site to get some examples.

Thanks, opamps are not my forte.

By erpirao

Paladin (995)

erpirao's picture

03-07-2018, 23:17

a DIY MSX? oh my good. photo please..

By lintweaker

Master (172)

lintweaker's picture

04-07-2018, 19:11

erpirao wrote:

a DIY MSX? oh my good. photo please..

Work in progress:

link to picture