[Sound Level Indicator]

Oh, I see. I'll try looking for MC34072.

MC33171 = 1 opamp and MC33174 = 4 opamps

Can I conclude that I can use two MC33171 instead of 1 MC33172 for this project?
MC33171 and 174 are available in our country. Thanks again! :)

[Sound Level Indicator]

Hello

I'm going to try this project. However, it seems that MC33172P is hard to find in my country. :(
Is there a good alternative to MC33172P?

Also, MC33171 and MC33174 are available. When I searched the datasheet, they have the same. Are they different? Can I use any of those 2 as an alternative? (Sorry, I'm new to these stuff)