ii have an acoustic guitar ..steel string tuning problem?

get an electic tuner, they work really well

or, the white dots on the brackets? if you press the one above the string, then play them both together they should sound the same if not, turn the string tuner until they sound the same.

Musical style speaks volumes when it comes to this issue. Those who want high volume will be unhappy with unamplified nylon string guitars. From my perspective, the basic difference between steel and nylon is this: steel strings ring and nylon strings resonate. The volume produced by steel is generally much greater than nylon but, to my way of thinking, the sound resonance produced by the wood of your guitar is largely masked by steel strings. If you have a decently made guitar (generally, around a thousand dollars and up), the sound interplay between the wood and the strings in a nylon guitar is magical across the entire frequency range. With a steel string guitar, the sound produced by the vibrating string overpowers the wood resonance at all but low frequencies. Personally, I'll take a nylon string guitar any day for the sensitivity gained from the interplay between wood and vibrating string.