This paper proposes a novel adaptive algorithm based on a new soft-regulator (σ, ρ, λ) for concurrent multimedia flows at end hosts. Our algorithm has the following features: (1) does requires the support of the network layers (routers and switches); (2) is scalable as it can be installed into any intermediated nodes for the delay control; (3) uses network resource efficiently, in particular, when the bandwidth of network is very limited. Performance experimental data have shown that (σ, ρ, λ) and related algorithm are efficient and applicable as compared with network layer solutions.